Java AssignmentUsing the ListNode.java file below Write method.pdf
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Java Assignment Using the ListNode.java file below Write methods called min and max that return the smallest and largest values in the linked list. These methods will be added to your ListNode class. For example if a variable called list stores {11, -7, 3, 42, 0, 14], the call of list.min() should return -7 and the call of list.max() should return 42. If the list is empty, return -1. Print the returned value. Write a method called insertNode that inserts a new node anywhere in your linked list. Display your linked list with new value. Write a program to test these methods to ensure accuracy and successful implementation. Upload your modified version of the ListNode java file only. Note: Original code should still be included. You will make additions and slight modifications where necessary. Throw exceptions where you think is necessary. // Listlode is a class for storing a single node of a linked // list. This node class is for a list of integer values. public class Listlode \{ public int data; //data stored in this node public Listliode front;//points to head node public Listliode next; /f link to next node in the list // post: constructs a node with data and null link public Listlode() \{ 3. // post: constructs a node with given data and null link: public Listlode(int data) \{ this(data, null); 3 // post: constructs a node with given data and given link. public Listlode(int data, Listliode next) \{ this.data = data; this. next = next; 3 public String toString() \{ if (front = null) : \} else \{ String result = " ["+ front data; Listliode current = front. next; while (current != null) \{ result +=m,m+ current data, current = current. next; 3 result += " ]n - return result; 3. }// post: appends the given value to the end of the list public void add(int value) \& puolic void aod if (front = nult) \{. front = new Listlode (value); 3 else \{ Listlode current = front; whistiode current = front; while (current next I= null) \{ current = current. next; 3 current. next = new Listliode (value ); 3. 3 J// post : returns the position of the first occurrence of the given /l value (-1 if not found ) public void remove (int index) \{ if ( index =){ \} else \{ Listiode current = nodeAt ( index - 1); current. next = current. next. next, 3 3 3// pre : <=i< size() // post: returns a reference to the node at the given index public Listlode nodeAt (int index) : List Node current = front; for (int i=0;i< index; i++) \{ current = current. next. \}. return current; 3.
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![Java Assignment
Using the ListNode.java file below
Write methods called min and max that return the smallest and largest values in the linked list.
These methods will be added to your ListNode class. For example if a variable called list stores
{11, -7, 3, 42, 0, 14], the call of list.min() should return -7 and the call of list.max() should return
42. If the list is empty, return -1. Print the returned value.
Write a method called insertNode that inserts a new node anywhere in your linked list. Display
your linked list with new value.
Write a program to test these methods to ensure accuracy and successful implementation. Upload
your modified version of the ListNode java file only.
Note: Original code should still be included. You will make additions and slight modifications
where necessary. Throw exceptions where you think is necessary. // Listlode is a class for storing
a single node of a linked // list. This node class is for a list of integer values. public class Listlode
{ public int data; //data stored in this node public Listliode front;//points to head node public
Listliode next; /f link to next node in the list // post: constructs a node with data and null link
public Listlode() { 3. // post: constructs a node with given data and null link: public Listlode(int
data) { this(data, null); 3 // post: constructs a node with given data and given link. public
Listlode(int data, Listliode next) { this.data = data; this. next = next; 3 public String toString() {
if (front = null) : } else { String result = " ["+ front data; Listliode current = front. next; while
(current != null) { result +=m,m+ current data, current = current. next; 3 result += " ]n - return
result; 3. }// post: appends the given value to the end of the list public void add(int value) &
puolic void aod if (front = nult) {. front = new Listlode (value); 3 else { Listlode current =
front; whistiode current = front; while (current next I= null) { current = current. next; 3 current.
next = new Listliode (value ); 3. 3 J// post : returns the position of the first occurrence of the
given /l value (-1 if not found ) public void remove (int index) { if ( index =){ } else { Listiode
current = nodeAt ( index - 1); current. next = current. next. next, 3 3 3// pre : <=i< size() // post:
returns a reference to the node at the given index public Listlode nodeAt (int index) : List Node
current = front; for (int i=0;i< index; i++) { current = current. next. }. return current; 3](https://image.slidesharecdn.com/javaassignmentusingthelistnode-230330175221-ce59f30e/85/Java-AssignmentUsing-the-ListNode-java-file-below-Write-method-pdf-1-320.jpg)
Recommended
In this assignment you will implement insert() method for a singly l.pdf
In this assignment you will implement insert() method for a singly linked Link list. The code
MyLinkedlist.java is given , it uses generic type as the linked list can be created with any object
type. Some methods like add() and toString() are already implemented. The MyLinkedList class
has a private nested class called Node.
The objective of this assignment is to implement the insert() method that takes two inputs an
element of generic type to be inserted and an index (value of integer type) at which it should be
inserted. For this assignment we will assume the first element has the index 0. if the given index
is less than zero do nothing but if it is greater than the size of the list, insert the element at the
end of the list. if the index is between 0 and size , insert it in the appropriate location. You insert
code should correctly update the theSize data member of the linked list. Return type for insert()
method is boolean (true or false) depending on whether the insertion was successful or not. Use
the following method header.
}
Main.java
//add necessary libraries
public class Main
{
//add your function here
public static void main (String [] args)
{
}
}
MyLinkedList.java
public class MyLinkedList {
// A private nested Node class
private static class Node{
public AnyType data; // Data members are public, this is fine as the Node class itself is
private
public Node next;
public Node(AnyType d, Node n)
{
data = d;
next=n;
}
@Override
public String toString() {
return data.toString();
}
}
// Data Members
private Node head; // A node pointer to the first item in the List
private int theSize; // a integer variable to hold the size of the List
public MyLinkedList() {
doClear();
}
public void clear() {
doClear();
}
private void doClear() {
head = null;
theSize =0 ;
}
// An add method that will always add at the beginning of the List
public boolean add(AnyType x) {
if(head == null) // List is empty
{
head = new Node(x, null);
theSize++;
return true;
}
else // List has at least one item lets get to the end of it
{
Node newnode = new Node(x, head);
head = newnode;
theSize++;
return true;
}
}
@Override
public String toString() {
// This to String method will print the List from head to the end.
String theList = "";
if(head==null)
return theList;
Node cur = head;
while(cur.next!=null) {
theList = theList + cur.toString() + " ";
cur= cur.next;
}
return theList + cur.toString();
}
public int getTheSize() {
return theSize;
}
}
/*****************************************************************************
*
*
* SOLUTION CODE BELOW THIS HEADER
*
*****************************************************************************/
/*****************************************************************************
*
*
* SOLUTION CODE ABOVE THIS HEADER
*
*****************************************************************************/
}
Current file: Main.java Load default template... //add necessary Libraries public class Main \{
//add your function here public static vo.
This assignment and the next (#5) involve design and development of a.pdf
This assignment and the next (#5) involve design and development of a sequential
non contiguous and dynamic datastructure called LinkedList. A linked list object is
a container consisting of connected ListNode objects. As before, we are not going
to use pre-fabricated classes from the c++ library, but construct the LinkedList
ADT from scratch.
The first step is construction and testing of the ListNode class. A ListNode object
contains a data field and a pointer to the next ListNode object (note the recursive
definition).
#This assignment requires you to
1. Read the Assignment 4 Notes
2. Watch the Assignment 4 Support video
3. Implement the following methods of the ListNode class
-custom constructor
-setters for next pointer and data
4. Implement the insert and remove method in the main program
5. Scan the given template to find the above //TODO and implement the code
needed
//TODO in ListNodecpp.h file
public: ListNode(T idata, ListNode<T> * newNext);
public: void setNext(ListNode<T> * newNext);
public: void setData(T newData);
// TODO in main program
void remove(ListNode<int> * &front,int value)
void insert(ListNode<int> * &front,int value)
# The driver is given ListNodeMain.cpp is given to you that does the following
tests
1. Declares a pointer called front to point to a ListNode of datatype integer
2. Constructs four ListNodes with data 1,2,4 and adds them to form a linked
list.
3. Inserts ListNode with data 3 to the list
4. Removes node 1 and adds it back to test removing and adding the first
element
5. Removes node 3 to test removing a middle node
6. Removes node 4 to test removing the last node
7. Attempt to remove a non existent node
8. Remove all existing nodes to empty the list
9. Insert node 4 and then node 1 to test if insertions preserve order
10.Print the list
Main.cpp
#include <iostream>
#include "ListNodecpp.h"
// REMEMBER each ListNode has two parts : a data field
// and an address field. The address is either null or points to the next node
//in the chain
//Requires: integer value for searching, address of front
//Effects: traverses the list node chain starting from front until the end comparing search value
with listnode getData. Returns the original search value if found, if not adds +1 to indicate not
found
//Modifies: Nothing
int search(ListNode<int> * front, int value);
//Requires: integer value for inserting, address of front
//Effects: creates a new ListNode with value and inserts in proper position (increasing order)in
the chain. If chain is empty, adds to the beginning
//Modifies: front, if node is added at the beginning.
//Also changes the next pointer of the previous node to point to the
//newly inserted list node. the next pointer of the newly inserted pointer
//points to what was the next of the previous node.
//This way both previous and current links are adjusted
//******** NOTE the use of & in passing pointer to front as parameter -
// Why do you think this is needed ?**********
void insert(ListNode<int> * &fr.
Sorted number list implementation with linked listsStep 1 Inspec.pdf
Sorted number list implementation with linked lists
Step 1: Inspect the Node.java file
Inspect the class declaration for a doubly-linked list node in Node.java. Access Node.java by
clicking on the orange arrow next to LabProgram.java at the top of the coding window. The
Node class has three fields:
a double data value,
a reference to the next node, and
a reference to the previous node.
Each field is protected. So code outside of the class must use the provided getter and setter
methods to get or set a field.
Node.java is read only, since no changes are required.
Step 2: Implement the insert() method
A class for a sorted, doubly-linked list is declared in SortedNumberList.java. Implement the
SortedNumberList class's insert() method. The method must create a new node with the
parameter value, then insert the node into the proper sorted position in the linked list. Ex:
Suppose a SortedNumberList's current list is 23 47.25 86, then insert(33.5) is called. A new
node with data value 33.5 is created and inserted between 23 and 47.25, thus preserving the list's
sorted order and yielding: 23 35.5 47.25 86
Step 3: Test in develop mode
Code in main() takes a space-separated list of numbers and inserts each into a SortedNumberList.
The list is displayed after each insertion. Ex: If input is
then output is:
Try various program inputs, ensuring that each outputs a sorted list.
Step 4: Implement the remove() method
Implement the SortedNumberList class's remove() method. The method takes a parameter for the
number to be removed from the list. If the number does not exist in the list, the list is not
changed and false is returned. Otherwise, the first instance of the number is removed from the
list and true is returned.
Uncomment the commented-out part in main() that reads a second input line and removes
numbers from the list. Test in develop mode to ensure that insertion and removal both work
properly, then submit code for grading. Ex: If input is
then output is:
Given templates:
LabProgram.java
import java.util.Scanner;
import java.io.PrintWriter;
public class LabProgram {
// Prints the SortedNumberList's contents, in order from head to tail
public static void printList(SortedNumberList list) {
Node node = list.head;
while (null != node) {
System.out.print(node.getData() + " ");
node = node.getNext();
}
System.out.println();
}
public static void main(String[] args) {
Scanner scnr = new Scanner(System.in);
String inputLine;
// Read the line of input numbers
inputLine = scnr.nextLine();
// Split on space character
String[] terms = inputLine.split(" ");
// Insert each value and show the sorted list's contents after each insertion
SortedNumberList list = new SortedNumberList();
for (Object term : terms) {
double number = Double.parseDouble(term.toString());
System.out.println("List after inserting " + number + ": ");
list.insert(number);
printList(list);
}
/*
// Read the input line with numbers to remove
inputLine = scnr.nextLine();
terms = inputLine.split(" ".
Design, implement, test(In Java ) a doubly linked list ADT, using DL.pdf
Design, implement, test(In Java ) a doubly linked list ADT, using DLLNode objects as the
nodes. In addition to our standard list operations, your class should provide for backward
iteration through the list. To support this operation, it should export a resetBack method and get a
getPrevious method.To facilitate this, you may want to include an instance variable last that
always references the last element on the list.
DLLNODE.java
public class DLLNode extends LLNode
{
private DLLNode back;
public DLLNode(T info)
{
super(info);
back = null;
}
public void setBack(DLLNode back)
// Sets back link of this DLLNode.
{
this.back = back;
}
public DLLNode getBack()
// Returns back link of this DLLNode.
{
return back;
}
}
LLNODE.java
public class LLNode
{
private LLNode link;
private T info;
public LLNode(T info)
{
this.info = info;
link = null;
}
public void setInfo(T info)
// Sets info of this LLNode.
{
this.info = info;
}
public T getInfo()
// Returns info of this LLONode.
{
return info;
}
public void setLink(LLNode link)
// Sets link of this LLNode.
{
this.link = link;
}
public LLNode getLink()
// Returns link of this LLNode.
{
return link;
}
}
This list can be an unsorted list. My professor suggested to reference off the RefUnsortedList
ADT and modifying it to be a doubly linked list.you need to create resetBack and getPrevious
methods which means you will need another variable to keep track of where you are in the
backward iteration. It is not correct to use currentPos to keep track of the backward iteration, so
make another variable (reference) for this, maybe call it currentBackPos.
RefUnsortedList.java
public class RefUnsortedList implements ListInterface
{
protected int numElements; // number of elements in this list
protected LLNode currentPos; // current position for iteration
// set by find method
protected boolean found; // true if element found, else false
protected LLNode location; // node containing element, if found
protected LLNode previous; // node preceeding location
protected LLNode list; // first node on the list
public RefUnsortedList()
{
numElements = 0;
list = null;
currentPos = null;
}
public void add(T element)
// Adds element to this list.
{
LLNode newNode = new LLNode(element);
newNode.setLink(list);
list = newNode;
numElements++;
}
protected void find(T target)
// Searches list for an occurence of an element e such that
// e.equals(target). If successful, sets instance variables
// found to true, location to node containing e, and previous
// to the node that links to location. If not successful, sets
// found to false.
{
location = list;
found = false;
while (location != null)
{
if (location.getInfo().equals(target)) // if they match
{
found = true;
return;
}
else
{
previous = location;
location = location.getLink();
}
}
}
public int size()
// Returns the number of elements on this list.
{
return numElements;
}
public boolean contains (T element)
// Returns true if this list contains an element e such that
// e.equals(el.
The MyLinkedList class used in Listing 24.6 is a one-way directional .docx
The MyLinkedList class used in Listing 24.6 is a one-way directional .docx
Consider the following definitions for linked lists for problems 6 thr.docx
Consider the following definitions for linked lists for problems 6 through 9. typedef int elementType; class LinkedList { public: LinkedList(); //other member functions . . . private: struct node { elementType data; node * next; }; node * first; }; 9. Write the method of the LinkedList class to calculate and return the range of the data values stored in an unsorted singly linked list. (Note: range = largest value – smallest value). Note: If list is empty return 0. int LinkedList::range()
Solution
//function to calculate range in linked list
int LinkedList::range()
{
elementType smallest,largest,range;
// point to the beginning of the list
node* ptr=first;
//if list empty, return 0
if(ptr==NULL)
return 0;
//list is not empty
//assume element in the beginning of the list is smallest
smallest==first->data;
//start from second element in list
ptr=ptr->next;
//traverse the list till end
while(ptr!=NULL)
{
//compare smallest with the items in the list
if(ptr->data<smallest)
{
//if any element is less than smallest
//replace the smallest with that element
smallest=ptr->data;
}
//move to the next node
ptr=ptr->next;
}
largest=first->data;
ptr=first->next;
while(ptr!=NULL)
{
if(ptr->data>largest)
{
largest=ptr->data;
}
ptr=ptr->next;
}
//find range and return it
range=largest-smallest;
return range;
}
.
Add these methods to the code - -Create at least three classes such.pdf
Add these methods to the code :
-Create at least three classes such as:
1. listnode- for data and link, constructors
2. Singlelinkedlist-for method definition
3. linkedlist-for objects
-Insert a node at tail/end in a linked list.
-Delete a node at a particular position in the list
code:
class listnodes{
int data;
listnodes link;
listnodes(){
data=0;
link=null;
}
listnodes(int d,listnodes l){
data=d;
link=l;
}
}
class singlelinkedlist{
public listnodes insertnode(int data,listnodes head){
listnodes newnode=new listnodes(data,null);
newnode.link=head;
head=newnode;
return head;
}
public listnodes insertAtPosition(listnodes head,int data,int position){
listnodes newnode=new listnodes(data,null);//create the newnode
listnodes previous=head;
int count=1;
while(count<=position-1)
{
previous=previous.link;
count++;
}
listnodes current=previous.link;
newnode.link=current;
previous.link=newnode;
return head;
}
public listnodes deletefirst(listnodes head){
listnodes pre=head;
head=head.link;
pre.link=null;
return pre;
}
public listnodes deletelast(listnodes head){
listnodes cur=head;
listnodes previouscur=head;
while(cur.link!=null){
previouscur=cur;
cur=cur.link;
}
previouscur.link=null;
return cur;
}
public int length(listnodes head)
{
listnodes current=head;
int c=0;
while(current!=null)
{
c++;
current=current.link;
}
return c;
}
public boolean find(listnodes head,int searchdata){
listnodes cur=head;
while(cur!=null)
{
if(cur.data==searchdata)
{
return true;
}
cur=cur.link;
}
return false;
}
void display(listnodes head){
listnodes current=head;
while(current.link!=null){
System.out.print(current.data+"-->");
current=current.link;
}
System.out.print(current.data);
}
}
public class LinkedList {
public static void main(String[] args) {
listnodes head=new listnodes(10,null);
singlelinkedlist sl=new singlelinkedlist();
sl.display(head);
System.out.println("\n*****Insert at front*****");
listnodes newhead=sl.insertnode(20, head);
sl.display(newhead);
System.out.println("\n*****Insert at a position*****");
sl.insertAtPosition(newhead, 40, 1);
sl.display(newhead);
}
}.
Recommended
In this assignment you will implement insert() method for a singly l.pdf
In this assignment you will implement insert() method for a singly linked Link list. The code
MyLinkedlist.java is given , it uses generic type as the linked list can be created with any object
type. Some methods like add() and toString() are already implemented. The MyLinkedList class
has a private nested class called Node.
The objective of this assignment is to implement the insert() method that takes two inputs an
element of generic type to be inserted and an index (value of integer type) at which it should be
inserted. For this assignment we will assume the first element has the index 0. if the given index
is less than zero do nothing but if it is greater than the size of the list, insert the element at the
end of the list. if the index is between 0 and size , insert it in the appropriate location. You insert
code should correctly update the theSize data member of the linked list. Return type for insert()
method is boolean (true or false) depending on whether the insertion was successful or not. Use
the following method header.
}
Main.java
//add necessary libraries
public class Main
{
//add your function here
public static void main (String [] args)
{
}
}
MyLinkedList.java
public class MyLinkedList {
// A private nested Node class
private static class Node{
public AnyType data; // Data members are public, this is fine as the Node class itself is
private
public Node next;
public Node(AnyType d, Node n)
{
data = d;
next=n;
}
@Override
public String toString() {
return data.toString();
}
}
// Data Members
private Node head; // A node pointer to the first item in the List
private int theSize; // a integer variable to hold the size of the List
public MyLinkedList() {
doClear();
}
public void clear() {
doClear();
}
private void doClear() {
head = null;
theSize =0 ;
}
// An add method that will always add at the beginning of the List
public boolean add(AnyType x) {
if(head == null) // List is empty
{
head = new Node(x, null);
theSize++;
return true;
}
else // List has at least one item lets get to the end of it
{
Node newnode = new Node(x, head);
head = newnode;
theSize++;
return true;
}
}
@Override
public String toString() {
// This to String method will print the List from head to the end.
String theList = "";
if(head==null)
return theList;
Node cur = head;
while(cur.next!=null) {
theList = theList + cur.toString() + " ";
cur= cur.next;
}
return theList + cur.toString();
}
public int getTheSize() {
return theSize;
}
}
/*****************************************************************************
*
*
* SOLUTION CODE BELOW THIS HEADER
*
*****************************************************************************/
/*****************************************************************************
*
*
* SOLUTION CODE ABOVE THIS HEADER
*
*****************************************************************************/
}
Current file: Main.java Load default template... //add necessary Libraries public class Main \{
//add your function here public static vo.
This assignment and the next (#5) involve design and development of a.pdf
This assignment and the next (#5) involve design and development of a sequential
non contiguous and dynamic datastructure called LinkedList. A linked list object is
a container consisting of connected ListNode objects. As before, we are not going
to use pre-fabricated classes from the c++ library, but construct the LinkedList
ADT from scratch.
The first step is construction and testing of the ListNode class. A ListNode object
contains a data field and a pointer to the next ListNode object (note the recursive
definition).
#This assignment requires you to
1. Read the Assignment 4 Notes
2. Watch the Assignment 4 Support video
3. Implement the following methods of the ListNode class
-custom constructor
-setters for next pointer and data
4. Implement the insert and remove method in the main program
5. Scan the given template to find the above //TODO and implement the code
needed
//TODO in ListNodecpp.h file
public: ListNode(T idata, ListNode<T> * newNext);
public: void setNext(ListNode<T> * newNext);
public: void setData(T newData);
// TODO in main program
void remove(ListNode<int> * &front,int value)
void insert(ListNode<int> * &front,int value)
# The driver is given ListNodeMain.cpp is given to you that does the following
tests
1. Declares a pointer called front to point to a ListNode of datatype integer
2. Constructs four ListNodes with data 1,2,4 and adds them to form a linked
list.
3. Inserts ListNode with data 3 to the list
4. Removes node 1 and adds it back to test removing and adding the first
element
5. Removes node 3 to test removing a middle node
6. Removes node 4 to test removing the last node
7. Attempt to remove a non existent node
8. Remove all existing nodes to empty the list
9. Insert node 4 and then node 1 to test if insertions preserve order
10.Print the list
Main.cpp
#include <iostream>
#include "ListNodecpp.h"
// REMEMBER each ListNode has two parts : a data field
// and an address field. The address is either null or points to the next node
//in the chain
//Requires: integer value for searching, address of front
//Effects: traverses the list node chain starting from front until the end comparing search value
with listnode getData. Returns the original search value if found, if not adds +1 to indicate not
found
//Modifies: Nothing
int search(ListNode<int> * front, int value);
//Requires: integer value for inserting, address of front
//Effects: creates a new ListNode with value and inserts in proper position (increasing order)in
the chain. If chain is empty, adds to the beginning
//Modifies: front, if node is added at the beginning.
//Also changes the next pointer of the previous node to point to the
//newly inserted list node. the next pointer of the newly inserted pointer
//points to what was the next of the previous node.
//This way both previous and current links are adjusted
//******** NOTE the use of & in passing pointer to front as parameter -
// Why do you think this is needed ?**********
void insert(ListNode<int> * &fr.
Sorted number list implementation with linked listsStep 1 Inspec.pdf
Sorted number list implementation with linked lists
Step 1: Inspect the Node.java file
Inspect the class declaration for a doubly-linked list node in Node.java. Access Node.java by
clicking on the orange arrow next to LabProgram.java at the top of the coding window. The
Node class has three fields:
a double data value,
a reference to the next node, and
a reference to the previous node.
Each field is protected. So code outside of the class must use the provided getter and setter
methods to get or set a field.
Node.java is read only, since no changes are required.
Step 2: Implement the insert() method
A class for a sorted, doubly-linked list is declared in SortedNumberList.java. Implement the
SortedNumberList class's insert() method. The method must create a new node with the
parameter value, then insert the node into the proper sorted position in the linked list. Ex:
Suppose a SortedNumberList's current list is 23 47.25 86, then insert(33.5) is called. A new
node with data value 33.5 is created and inserted between 23 and 47.25, thus preserving the list's
sorted order and yielding: 23 35.5 47.25 86
Step 3: Test in develop mode
Code in main() takes a space-separated list of numbers and inserts each into a SortedNumberList.
The list is displayed after each insertion. Ex: If input is
then output is:
Try various program inputs, ensuring that each outputs a sorted list.
Step 4: Implement the remove() method
Implement the SortedNumberList class's remove() method. The method takes a parameter for the
number to be removed from the list. If the number does not exist in the list, the list is not
changed and false is returned. Otherwise, the first instance of the number is removed from the
list and true is returned.
Uncomment the commented-out part in main() that reads a second input line and removes
numbers from the list. Test in develop mode to ensure that insertion and removal both work
properly, then submit code for grading. Ex: If input is
then output is:
Given templates:
LabProgram.java
import java.util.Scanner;
import java.io.PrintWriter;
public class LabProgram {
// Prints the SortedNumberList's contents, in order from head to tail
public static void printList(SortedNumberList list) {
Node node = list.head;
while (null != node) {
System.out.print(node.getData() + " ");
node = node.getNext();
}
System.out.println();
}
public static void main(String[] args) {
Scanner scnr = new Scanner(System.in);
String inputLine;
// Read the line of input numbers
inputLine = scnr.nextLine();
// Split on space character
String[] terms = inputLine.split(" ");
// Insert each value and show the sorted list's contents after each insertion
SortedNumberList list = new SortedNumberList();
for (Object term : terms) {
double number = Double.parseDouble(term.toString());
System.out.println("List after inserting " + number + ": ");
list.insert(number);
printList(list);
}
/*
// Read the input line with numbers to remove
inputLine = scnr.nextLine();
terms = inputLine.split(" ".
Design, implement, test(In Java ) a doubly linked list ADT, using DL.pdf
Design, implement, test(In Java ) a doubly linked list ADT, using DLLNode objects as the
nodes. In addition to our standard list operations, your class should provide for backward
iteration through the list. To support this operation, it should export a resetBack method and get a
getPrevious method.To facilitate this, you may want to include an instance variable last that
always references the last element on the list.
DLLNODE.java
public class DLLNode extends LLNode
{
private DLLNode back;
public DLLNode(T info)
{
super(info);
back = null;
}
public void setBack(DLLNode back)
// Sets back link of this DLLNode.
{
this.back = back;
}
public DLLNode getBack()
// Returns back link of this DLLNode.
{
return back;
}
}
LLNODE.java
public class LLNode
{
private LLNode link;
private T info;
public LLNode(T info)
{
this.info = info;
link = null;
}
public void setInfo(T info)
// Sets info of this LLNode.
{
this.info = info;
}
public T getInfo()
// Returns info of this LLONode.
{
return info;
}
public void setLink(LLNode link)
// Sets link of this LLNode.
{
this.link = link;
}
public LLNode getLink()
// Returns link of this LLNode.
{
return link;
}
}
This list can be an unsorted list. My professor suggested to reference off the RefUnsortedList
ADT and modifying it to be a doubly linked list.you need to create resetBack and getPrevious
methods which means you will need another variable to keep track of where you are in the
backward iteration. It is not correct to use currentPos to keep track of the backward iteration, so
make another variable (reference) for this, maybe call it currentBackPos.
RefUnsortedList.java
public class RefUnsortedList implements ListInterface
{
protected int numElements; // number of elements in this list
protected LLNode currentPos; // current position for iteration
// set by find method
protected boolean found; // true if element found, else false
protected LLNode location; // node containing element, if found
protected LLNode previous; // node preceeding location
protected LLNode list; // first node on the list
public RefUnsortedList()
{
numElements = 0;
list = null;
currentPos = null;
}
public void add(T element)
// Adds element to this list.
{
LLNode newNode = new LLNode(element);
newNode.setLink(list);
list = newNode;
numElements++;
}
protected void find(T target)
// Searches list for an occurence of an element e such that
// e.equals(target). If successful, sets instance variables
// found to true, location to node containing e, and previous
// to the node that links to location. If not successful, sets
// found to false.
{
location = list;
found = false;
while (location != null)
{
if (location.getInfo().equals(target)) // if they match
{
found = true;
return;
}
else
{
previous = location;
location = location.getLink();
}
}
}
public int size()
// Returns the number of elements on this list.
{
return numElements;
}
public boolean contains (T element)
// Returns true if this list contains an element e such that
// e.equals(el.
The MyLinkedList class used in Listing 24.6 is a one-way directional .docx
The MyLinkedList class used in Listing 24.6 is a one-way directional .docx
Consider the following definitions for linked lists for problems 6 thr.docx
Consider the following definitions for linked lists for problems 6 through 9. typedef int elementType; class LinkedList { public: LinkedList(); //other member functions . . . private: struct node { elementType data; node * next; }; node * first; }; 9. Write the method of the LinkedList class to calculate and return the range of the data values stored in an unsorted singly linked list. (Note: range = largest value – smallest value). Note: If list is empty return 0. int LinkedList::range()
Solution
//function to calculate range in linked list
int LinkedList::range()
{
elementType smallest,largest,range;
// point to the beginning of the list
node* ptr=first;
//if list empty, return 0
if(ptr==NULL)
return 0;
//list is not empty
//assume element in the beginning of the list is smallest
smallest==first->data;
//start from second element in list
ptr=ptr->next;
//traverse the list till end
while(ptr!=NULL)
{
//compare smallest with the items in the list
if(ptr->data<smallest)
{
//if any element is less than smallest
//replace the smallest with that element
smallest=ptr->data;
}
//move to the next node
ptr=ptr->next;
}
largest=first->data;
ptr=first->next;
while(ptr!=NULL)
{
if(ptr->data>largest)
{
largest=ptr->data;
}
ptr=ptr->next;
}
//find range and return it
range=largest-smallest;
return range;
}
.
Add these methods to the code - -Create at least three classes such.pdf
Add these methods to the code :
-Create at least three classes such as:
1. listnode- for data and link, constructors
2. Singlelinkedlist-for method definition
3. linkedlist-for objects
-Insert a node at tail/end in a linked list.
-Delete a node at a particular position in the list
code:
class listnodes{
int data;
listnodes link;
listnodes(){
data=0;
link=null;
}
listnodes(int d,listnodes l){
data=d;
link=l;
}
}
class singlelinkedlist{
public listnodes insertnode(int data,listnodes head){
listnodes newnode=new listnodes(data,null);
newnode.link=head;
head=newnode;
return head;
}
public listnodes insertAtPosition(listnodes head,int data,int position){
listnodes newnode=new listnodes(data,null);//create the newnode
listnodes previous=head;
int count=1;
while(count<=position-1)
{
previous=previous.link;
count++;
}
listnodes current=previous.link;
newnode.link=current;
previous.link=newnode;
return head;
}
public listnodes deletefirst(listnodes head){
listnodes pre=head;
head=head.link;
pre.link=null;
return pre;
}
public listnodes deletelast(listnodes head){
listnodes cur=head;
listnodes previouscur=head;
while(cur.link!=null){
previouscur=cur;
cur=cur.link;
}
previouscur.link=null;
return cur;
}
public int length(listnodes head)
{
listnodes current=head;
int c=0;
while(current!=null)
{
c++;
current=current.link;
}
return c;
}
public boolean find(listnodes head,int searchdata){
listnodes cur=head;
while(cur!=null)
{
if(cur.data==searchdata)
{
return true;
}
cur=cur.link;
}
return false;
}
void display(listnodes head){
listnodes current=head;
while(current.link!=null){
System.out.print(current.data+"-->");
current=current.link;
}
System.out.print(current.data);
}
}
public class LinkedList {
public static void main(String[] args) {
listnodes head=new listnodes(10,null);
singlelinkedlist sl=new singlelinkedlist();
sl.display(head);
System.out.println("\n*****Insert at front*****");
listnodes newhead=sl.insertnode(20, head);
sl.display(newhead);
System.out.println("\n*****Insert at a position*****");
sl.insertAtPosition(newhead, 40, 1);
sl.display(newhead);
}
}.
Can somebody solve the TODO parts of the following problem- Thanks D.pdf
Can somebody solve the TODO parts of the following problem.
Thanks
Description
This assignment builds on top of the ListNode class designed and tested in Assignment 4 where
constructionand testing of the ListNode class has already been done. Recall that a ListNode
object contains a data field and a pointer to the next ListNode object.
We now encapsulate the functions to create, search and update the database into a LinkedList
class. There are two members in this class. A pointer called front that points to a ListNode object
and an integer count of the total number of objects currently in the list.
As before, we are not going to use pre-fabricated classes from the c++ library, but construct the
LinkedList ADT from scratch.
We can now use this class to create a LinkedList object which contains a collection of ListNodes
each having a Song object in the data field. The api is put through its paces by initially testing it
on a dummy database containing four songs. The main program then repeats the testing process
with the song list in the file SongData.txt and then again with the song list in the file
SongDataDouble.txt.
The number of steps taken to populate the database for both files is recorded.
Instruction
#This assignment requires you to
Read the Assignment 5 Notes
Watch the Assignment 5 Support video
Implement the following methods of the LinkedList class
-custom constructor
-setters for next pointer and data
Implement the insert, remove and get method in the LinkedListcpp.h file
Scan the given template to find the above //TODO and implement the code needed
//Requires: Song for inserting
//Effects: creates a new ListNode with input value and inserts in proper position (increasing order
of chart position)in the chain. If LinkedList, adds to the beginning
//Modifies: front, if node is added at the beginning.
//Also changes the next pointer of the previous node to point to the newly inserted list node. the
next pointer of the newly inserted pointer points to what was the next of the previous node. This
way both previous and current links are adjusted
//TODO
template <class T>
int LinkedList<T>::insert( T value, SortBy<T> f){
int steps=0;
//TODO
return steps;
}
//Requires: Song title for searching
//Effects: traverses the LinkedList (database) starting from front until the end comparing titles
Returns the original search value if found otherwise returns an empty song with blank title
//Modifies: Nothing
//TODO
template <class T>
T LinkedList<T>::get(T value){
ListNode<T> * current = front;//this may need to change
//TODO
return current->getData();
}
//TODO
template <class T>
int LinkedList<T>::remove(T value){
//TODO
int steps=0;
return steps;
}
/ /Requires: index position of Song to be found
//Effects: traverses the LinkedList starting from front and travels to the index position (if valid)
and returns the song at that index position. Note index position may NOT be the same as chart
position
//Modifies: Nothing
//TODO
template <class T>
T Linke.
Write a JAVA LinkedListRec class that has the following methods siz.pdf
Write a JAVA LinkedListRec class that has the following methods: size, empty, insertBefore,
insertAfter, addAtHead, addAtEnd, remove, replace, peekFront, peekEnd, removeFront,
removeEnd, toString. Use recursion to implement most of these methods. Write a driver to test
your implemented LinkedListRec class methods.
Solution
import java.util.Scanner;
public class LinkedListRec {
int data;
LinkedListRec prev=null,next=null;
int size(LinkedListRec l)//method which returns the length of the list
{
if(l==null)return 0;
return 1+size(l.next);
}
boolean empty(LinkedListRec l)//method checks whether the list is empty or not...
{
if(l==null)return true;
else return false;
}
LinkedListRec insertBefore(LinkedListRec l,int value,int num_insertbefore)//method which
adds a new number before the given number..
{
if(l==null)return l;
if(l.data == num_insertbefore)
{
LinkedListRec n = new LinkedListRec();
n.data = value;
if(l.prev==null)
{
n.next = l;
l=n;
}
else
{
n.prev = l.prev;
n.next= l;
l.prev = n;
}
return l;
}
return insertBefore(l.next,value,num_insertbefore);
}
LinkedListRec insertAfter(LinkedListRec l,int value,int num_insertafter)//method which adds
the new number after the given number
{
if(l==null)return l;
if(l.data == num_insertafter)
{
LinkedListRec n = new LinkedListRec();
n.data = value;
if(l.next==null)
{
l.next = n;
n.prev = l;
}
else
{
n.next = l.next;
l.next.prev = n;
n.prev = l;
}
return l;
}
return insertAfter(l.next,value,num_insertafter);
}
LinkedListRec addAtHead(LinkedListRec l,int value)//method which adds a new number at
the head position of the list...
{
LinkedListRec n = new LinkedListRec();
n.data=value;
n.next = l;
l=n;
return l;
}
LinkedListRec addAtEnd(LinkedListRec l,int value)//method which adds a new number at
the end position of the list...
{
if(l==null){ l = new LinkedListRec();l.data = value;return l;}
if(l.next==null)
{
LinkedListRec n = new LinkedListRec();
n.data=value;
n.prev = l;
l.next = n;
return l;
}
return addAtEnd(l.next,value);
}
LinkedListRec remove(LinkedListRec l,int value)//method which removes given numbet
from the list....
{
if(l==null)return l;
if(l.data == value)
{
if(l.prev!=null){
l.prev = l.next;
}
else
l=l.next;
return l;
}
return remove(l.next,value);
}
boolean replace(LinkedListRec l,int value,int newvalue)//method which replaces current
number with new number,...
{
if(l==null)return false;
if(l.data == value)
{
l.data = newvalue;
return true;
}
return replace(l.next,value,newvalue);
}
int peekFront(LinkedListRec l)//method which returns the first value of the list...
{
if(l!=null)
return l.data;
else return -1;
}
int peekEnd(LinkedListRec l)//method which returns the last value of the list........
{
if(l==null)return -1;
if(l.next == null)return l.data;
return peekEnd(l.next);
}
LinkedListRec removeFront(LinkedListRec l)//method which removes the first element of the
list..
{
if(l==null)return l;
l=l.next;
return l;
}
boolean removeEnd(LinkedListRec l)//method which removes the last element o.
Dividing a linked list into two sublists of almost equal sizesa. A.pdf
Dividing a linked list into two sublists of almost equal sizes
a. Add the operation divideMid to the class linkedListType as follows:
Consider the following statements:
unorderedLinkedList myList;
unorderedLinkedList subList;
Suppose myList points to the list with elements 34 65 27 89 12 (in this order). The statement:
myList.divideMid(subList); divides myList into two sublists: myList points to the list with the
elements 34 65 27,
and subList points to the sublist with the elements 89 12.
b. Write the definition of the function template to implement the operation divideMid. Also,
write a program to test your function. The header files linkedList.h and unorderedLinkedList.h
are supplied. Your test program should produce output similar to this:
Turn in:
linkedList.h with modifications
Your test program.
(C++)
Required code is below:
#ifndef H_UnorderedLinkedList
#define H_UnorderedLinkedList
#include \"linkedList.h\"
using namespace std;
template
class unorderedLinkedList: public linkedListType
{
public:
bool search(const Type& searchItem) const;
//Function to determine whether searchItem is in the list.
//Postcondition: Returns true if searchItem is in the
// list, otherwise the value false is
// returned.
void insertFirst(const Type& newItem);
//Function to insert newItem at the beginning of the list.
//Postcondition: first points to the new list, newItem is
// inserted at the beginning of the list,
// last points to the last node in the
// list, and count is incremented by 1.
void insertLast(const Type& newItem);
//Function to insert newItem at the end of the list.
//Postcondition: first points to the new list, newItem
// is inserted at the end of the list,
// last points to the last node in the
// list, and count is incremented by 1.
void deleteNode(const Type& deleteItem);
//Function to delete deleteItem from the list.
//Postcondition: If found, the node containing
// deleteItem is deleted from the list.
// first points to the first node, last
// points to the last node of the updated
// list, and count is decremented by 1.
};
template
bool unorderedLinkedList::
search(const Type& searchItem) const
{
nodeType *current; //pointer to traverse the list
bool found = false;
current = this->first; //set current to point to the first
//node in the list
while (current != NULL && !found) //search the list
if (current->info == searchItem) //searchItem is found
found = true;
else
current = current->link; //make current point to
//the next node
return found;
}//end search
template
void unorderedLinkedList::insertFirst(const Type& newItem)
{
nodeType *newNode; //pointer to create the new node
newNode = new nodeType; //create the new node
newNode->info = newItem; //store the new item in the node
newNode->link = this->first; //insert newNode before first
this->first = newNode; //make first point to the
//actual first node
this->count++; //increment count
if (this->last == NULL) //if the list was empty, newNode is also
//the last node in the list
this->l.
Lecture 18Dynamic Data Structures and Generics (II).docx
Lecture 18
Dynamic Data Structures and Generics (II)
*
*
Class ArrayListObject of an ArrayList can be used to store an unlimited number of objects.
*
Methods of ArrayList (I)
*
java.util.ArrayList
+ArrayList()
+add(o: Object) : void
+add(index: int, o: Object) : void
+clear(): void
+contains(o: Object): boolean
+get(index: int) : Object
+indexOf(o: Object) : int
+isEmpty(): boolean
+lastIndexOf(o: Object) : int
+remove(o: Object): boolean
+size(): int
+remove(index: int) : Object
+set(index: int, o: Object) : Object
Appends a new element o at the end of this list.
Adds a new element o at the specified index in this list.
Removes all the elements from this list.
Returns true if this list contains the element o.
Returns the element from this list at the specified index.
Returns the index of the first matching element in this list.
Returns true if this list contains no elements.
Returns the index of the last matching element in this list.
Removes the element o from this list.
Returns the number of elements in this list.
Removes the element at the specified index.
Sets the element at the specified index.
Creates an empty list.
Methods of ArrayList (II) Array is used to implement the methodsMethods get(int index) and set(int index, Object o) for accessing and modifying an element through an index and the add(Object o) for adding an element at the end of the list are efficient. Why?Methods add(int index, Object o) and remove(int index) are inefficient because it requires shifting potentially a large number of elements.
*
Linked Data StructureTo improve efficiency for adding and removing an element anywhere in a list.It containsCollection of objectsEach object contains data and a reference to another object in the collection
*
Linked ListA dynamic data structureA linked list consists of nodes. Each node contains an elementa link: linked to its next neighbor. Example: take notes in the class!
*
Linked List
*
ListNodes
ListNodes in Linked List
public class ListNode { // fill the comments
private String data; //
private ListNode link; //
/** */
public ListNode () {
link = null; //
data = null; //
}
/** */
public ListNode (String newData, ListNode linkValue) {
data = newData;
link = linkValue;
}
*
ListNodes in Linked List (cont’d)
/** */
public void setData (String newData) {
data = newData;
}
/** */
public String getData () {
return data;
...
Write a method expand that could be added to the LinkedlntList class f.docx
Write a method expand that could be added to the LinkedlntList class from lecture and section. The method accepts an integer fas a parameter and replaces every value/with f copies of the value (i/f). Suppose a LinkedlntList variable list stores the following values: [21, 8, 15, 0, -_3, 32] The call list.expand(3); would change the list to store the following elements: \\7. 7. 7. 2. 2. 2. 5. 5. 5. 0. 0. 0. -1. -1. -1. 10. 10. 101 If an element of the original list is not evenly divisible by f, as with 8 and 32 above, the resulting list should truncate any fractional component (as is done naturally by integer division). If the parameter value passed is 1, the list is unchanged. If it is 0 or negative, the list should become empty. For full credit, your solution must run in O(N) time where N is the length of the list. You may not call any methods of the linked list class to solve this problem, and you may not use any auxiliary data structure to solve this problem (such as an array, ArrayList, Queue, String, etc). Assume that you are using the LinkedlntList and ListNode class as defined in lecture and section: public class LinkedlntList { private ListNode front; methods public class ListNode { public int data;//data stored in this node public ListNode next;//a link to the next node in the list public ListNode() {...} public ListNode(int data) {...} public ListNode(int data, ListNode next) {...}
Solution
//Function:
public void expand(int f)
{
ListNode ptr = start;
ListNode prev;
while(ptr!=null)
{
prev=ptr.getLink();
//get the existing data
int i=ptr.getData();
// find quotient
int v=i/f;
//replace existing data with quotient
ptr.setData(v);
//f-1 times expanding the same node
for(int i=0;i<f-1;i++)
{
//create new node with quotient value
ListNode nptr = new ListNode(v, null);
// attach to list
ptr.setLink(nptr);
ptr=nptr.getLink();
}
ptr.setLink(prev);
// moving to the next node in the original list
ptr=prev;
}
}
.
Write a method expand that could be added to the LinkedlntList class .docx
Write a method expand that could be added to the LinkedlntList class
Data Structures and Agorithm: DS 04 Linked List.pptx
Data Structures and Agorithm: DS 04 Linked List.pptx
In java.Write a class called GenDoubleLinkedList which is a generi.pdf
In java.
Write a class called GenDoubleLinkedList which is a generic double linked list. This link list is
similar to the single linked list that was shown in class except that each node in addition to
having data and nextLink (which was originally called link) now has prevLink.
The class GenDoubleLinkedList needs to have the following:
Internal class ListNode which hasInstance Variables
data of type T
nextLink of type ListNode
prevLink of type ListNode
Constructors
Default
Parameterized
Instance Variables
head of type ListNode which always points to the beginning of the linked list
current of type ListNode which moves around pointing to one of the nodes
Constructor
A default constructor that initializes head to an empty ListNode and sets current to point at the
head.
Methods
goToNext – This moves the current node forward in the list by one node. It doesn’t move
forward if that node is null
goToPrev – This moves the current node backwards in the list by one node. It doesn’t move
backwards if that node is null.
getDataAtCurrent – returns the data at the current node as long as the current isn’t null
setDataAtCurrent – takes in a parameter and sets the data at the current node to that value as long
as current is not null
insertNodeAfterCurrent – creates a new node based on data that is passed in by a parameter and
puts that node after the current position
deleteCurrentNode – removes the current node from the list by resetting the links
showList – prints out the contents of the list line-by-line
inList – returns a true or false value based on whether or not the data passed in via a parameter is
in the list
Solution
package com.quad.generic;
public class GenDoubleLinkedList {
private ListNode head;
private ListNode tail;
private int size;
public int getSize() {
return size;
}
/**
*
*/
public GenDoubleLinkedList() {
this.head = null;
this.size = 0;
}
@SuppressWarnings(\"hiding\")
class ListNode{
private T data;
private ListNode nextLink;
private ListNode prevLink;
/**
*
*/
public ListNode() {
nextLink=null;
prevLink=null;
data=null;
}
/**
* @param data
* @param nextLink
* @param prevLink
*/
public ListNode(T data, ListNode nextLink,
ListNode prevLink) {
super();
this.data = data;
this.nextLink = nextLink;
this.prevLink = prevLink;
}
public T getData() {
return data;
}
public void setData(T data) {
this.data = data;
}
public ListNode getNextLink() {
return nextLink;
}
public void setNextLink(ListNode nextLink) {
this.nextLink = nextLink;
}
public ListNode getPrevLink() {
return prevLink;
}
public void setPrevLink(ListNode prevLink) {
this.prevLink = prevLink;
}
}
public void goToNext(){
ListNode temp = head;
while(temp != null){
temp = temp.getNextLink();
}
}
public void goToPrev() {
ListNode temporary = tail;
while(temporary != null){
temporary = temporary.getPrevLink();
}
}
public T getDataAtCurrent (int index) {
if (index < 0 || index >= size) {
throw new IndexOutOfBoundsException();
} else {
ListNode current = head;
for (int i = 0; i < index; i.
Select three methods in the ObjectList class to work through algori.pdf
Select three methods in the ObjectList class to work through algorithmically. Describe any
special cases or boundary conditions that might exist for each of the three methods selected. Be
sure to draw pictures as you work through the methods. Remember that you cannot work on
linked lists without drawing pictures. The homework will not be accepted without submitting the
pictures! Write a Java method with the signature: public objectList intersect (objectList list1,
objectList list2) that accepts two unordered linear linked lists and returns a third linear linked list
whose nodes contains the intersection of the two original linear linked lists. Note that the
intersection of two lists is a new list containing the elements that the two lists have in common,
without modifying the two original lists. Describe any boundary conditions that might exist.
Solution
Node.java
//Defines each node of a linked list
public class Node{
int data;
Node next;
Node(int d)
{
data = d;
next = null;
}
}
ObjectList.java
public class ObjectList{
public Node head;
/* Utility function to print list */
public void printList()
{
Node temp = head;
while(temp != null)
{
System.out.print(temp.data+\" \");
temp = temp.next;
}
System.out.println();
}
/* Inserts a node at start of linked list */
public void push(int new_data)
{
/* 1 & 2: Allocate the Node &
Put in the data*/
Node new_node = new Node(new_data);
/* 3. Make next of new Node as head */
new_node.next = head;
/* 4. Move the head to point to new Node */
head = new_node;
}
/* A utilty function that returns true if data is present
in linked list else return false */
public boolean isPresent (int data){
Node t = this.head;
while (t != null)
{
if (t.data == data)
return true;
t = t.next;
}
return false;
}
}
Intersection.java
//Implements the intersection method.
class Intersection{
static public ObjectList intersect(ObjectList list1, ObjectList list2){
ObjectList result = new ObjectList();
//Node t1 = head1;
Node t1 = list1.head;
Node t2 = list2.head;
// Traverse list1 and search each element of it in list2.
// If the element is present in list 2, then insert the
// element to result
while (t1 != null){
if (list2.isPresent(t1.data))
result.push(t1.data);
t1 = t1.next;
}
return result;
}
/* Driver program to test above functions */
public static void main(String args[]){
ObjectList llist1 = new ObjectList();
ObjectList llist2 = new ObjectList();
ObjectList unin = new ObjectList();
ObjectList intersecn = new ObjectList();
/*create a linked lits 10->15->5->20 */
llist1.push(20);
llist1.push(4);
llist1.push(15);
llist1.push(10);
/*create a linked lits 8->4->2->10 */
llist2.push(10);
llist2.push(2);
llist2.push(4);
llist2.push(8);
intersecn = intersect(llist1, llist2);
intersecn.printList();
}
}.
Write an algorithm that reads a list of integers from the keyboard, .pdf
Write an algorithm that reads a list of integers from the keyboard, creates
a list of them using linked list implementation, and prints the result
Solution
/*
Algorithm:
Implementation of linked list.
Create a node type class which will hold an integer and next pointer to point to another node.
Create a constructor which will construct an object of type node with the integer type data as the
only parameter
and initializing next pointer to NULL.
Create LinkedList class which will only have head pointer.
Create a constructor which will initialize this head pointer to NULL.
Create a append method which will recieve an input of type integer from the user and append it
to LinkedList
using below steps:
1.Create a Node type object.
1.IF head is NULL assign a Node type object created in 1st step.
2.IF head is not NULL then traverse to the end of the linked list till you found a Node which has
next pointer
set to NULL.
3.Add Node type object created in first step to the next pointer of last node.
Create a print method which will traverse the list from the head of the linked list to the last
node(Node
with next pointer NULL) and while traversing it will keep printing the node data.
Get the userinput:
Ask user for integer continously till user input -1 and append all the integers to the linked list.
*/
PROGRAM:
#include
using namespace std;
class Node
{
public:
int data;
Node *next;
Node(int data)
{
this->data = data;
this->next = NULL;
}
};
class LinkedList
{
private:
Node *head;
public:
LinkedList()
{
head = NULL;
}
void addToFront(int data)
{
Node *temp = new Node(data);
if(head == NULL)
head = temp;
else
{
temp->next = head;
head = temp;
}
}
void append(int data)
{
Node *temp = new Node(data);
Node *current = head;
if(current == NULL)
{
head = temp;
return;
}
while(current->next != NULL)
{
current = current->next;
}
current->next = temp;
}
void print()
{
Node *current = head;
if(current == NULL)
cout << \"No element in list. \ \";
while(current != NULL)
{
cout << current->data << \" \";
current = current->next;
}
cout << endl;
}
void deleteLinkedList()
{
Node *prev;
Node *current = head;
while(current!=NULL)
{
prev = current;
current = current->next;
delete prev;
}
}
void deleteLastNode()
{
Node *current = head;
Node *prev = NULL;
if(current == NULL)
return;
while(current->next != NULL)
{
prev = current;
current = current->next;
}
if(prev == NULL)
{
delete current;
head = NULL;
}
else
{
prev->next = NULL;
delete current;
}
}
~LinkedList()
{
deleteLinkedList();
}
};
int main()
{
LinkedList list;
int data;
while(1)
{
cout << \"Enter the integer(-1 to Quit) : \";
cin >> data;
if(data==-1)
break;
list.append(data);
}
cout << \"Content of LinkedList is : \";
list.print();
return 0;
}
OUTPUT:
Enter the integer(-1 to Quit) : 1
Enter the integer(-1 to Quit) : 2
Enter the integer(-1 to Quit) : 3
Enter the integer(-1 to Quit) : 4
Enter the integer(-1 to Quit) : -1
Content of LinkedList is : 1 2 3 4.
There are a couple of new methods that you will be writing for this pr.pdf
There are a couple of new methods that you will be writing for this project. Some are easy, some
are hard. I have provided code that tests most of the methods by calling them from the main
method in the file ListTest.java. The test file will only work when you have done all the
methods. In COMP182LinkedList.java I have provided the signature (definition and input
parameters) for these methods. At this point to make sure you can run the file
(COMP182LinkedList.java that you downloaded from Cavas) I have added template values as
return types of the methods. For example, if the method returns an int then I added return 0 as the
return value. Here are the methods are as follows: Anything getFixst () Anything getLast () void
add (Anything value) void addafter (1nt index, Anyehtng value) Anything set(int index,
Rnything aewvalue) void removeAl1 (Anything vaiue) lastIndex (Anything value)
COMP182IinkedIi ateAnything; elone boolean equala (object in) CoMP182IinkedList
KAnythang? gplat () boolean hascycle () Node reveraeliat () Node oddeventiat () Node
deleteDuplicates () boolean ispalindrome () "For the last two methods, you need to add proper
testing to ListTest Java Method Specifications Here are more details for implementing each of
these methods. You need to complete all the following methods in the COMP182LinkedList
class. You can write the methods in any order you wish, but I suggest you do them in the order
they are listed. In particular, make sure all your methods work for empty lists, lists of different
sizes, etc as you can see from the sample test cases provided in ListTest.java. While grading your
project, we will make changes to these values! Also, make sure that your solutions do not modify
the original lists (unless you are specifically instructed to do so). roid main(String[] args) You
can use this method in the ListTest class to create lists as needed and test each of the methods
listed above. I have provided a few test cases, but you may want to add more to some of the
method tests. Until you get add working, you will need to use addFirst to create lists to test your
other methods. Anything getFirsto This method returns the value stored in the first node an the
list. It should prit an error message and seturn null if the list is empty. Anything getLasto This
method returns the value stored in the last node in the list. It should print an error mesiage and
retuin noll if the list is emipty. void add(Anything value) Thus method adds a nade containing
new yalue to the end of the last. This method returns the value stored in the first node in the list.
It should print an error message and return null if the list is empty. Anything getLast0 This
method returns the value stored in the last node in the list. It should print an error message and
retum null if the list is empty: void add(Anything value) This method adds a node containing
new value to the end of the list. void addAfter(int index, Anything value) This method adds a
node contai.
Write a function to merge two doubly linked lists. The input lists ha.pdf
Write a function to merge two doubly linked lists. The input lists have their elements in sorted
order, from lowest to highest. The output list should also be sorted from lowest to highest. Your
algorithm should run in linear time on the length of the output list. Provide an algorithm for your
function Implement and show some samples of your running function
Solution
The algorithm for LinkedList MergeSort is as follows.
The trick in this algorithm is to use a local list to store the value which is pointing to the actual
list to be returned as a result of the function
Step1: START
Step2: GET inputs of list1 and list2
Step3: INITIALIZE mergelist
STEP4: SET mylist = mergelist
Step5: WHILE list1 OR list2 is EMPTY
DO
IF (list1 AND list2) are NOT EMPTY
IF list1.value > list2.value
mylist.next = list2
ELSE
mylist.next = list1
ELSE IF list1 is EMPTY
mylist.next = list2
ELSE
mylist.next = list1
Step6: RETURN mergelist
Step7: STOP
Sample program for the same implemented in C++
//====================================================================
========
// Name : DoublyLinkedList.cpp
// Author : Kaju
// Version : 0.1
// Copyright : This is just an example code
// Description : MergeSort in C++, Ansi-style
//====================================================================
========
/*
* C++ Program to Implement Doubly Linked List
*/
#include
#include
#include
/*
* Node Declaration
*/
using namespace std;
// struct declaration for node which will hold the integer data with links to previous data and next
data
struct node
{
int data;
struct node *next;
struct node *prev;
};
/*
Class Declaration
*/
class DoublyLinkedList
{
private:
struct node *start; // collection of all the nodes
public:
void create(int value);
int peek();
int delete_head();
void display();
int count();
void mergeSort(DoublyLinkedList list1, DoublyLinkedList list2);
DoublyLinkedList()
{
start = NULL;
}
};
/*
* Add data into the list
*/
void DoublyLinkedList::create(int value)
{
struct node *s, *temp;
temp = new(struct node);
temp->data = value;
temp->next = NULL;
if (start == NULL)
{
temp->prev = NULL;
start = temp;
}
else
{
s = start;
while (s->next != NULL)
s = s->next;
s->next = temp;
temp->prev = s;
}
}
/*
* Deletion of the first element from the list
* store the first element in a temp node and then remove it from start.
*/
int DoublyLinkedList::delete_head()
{
struct node *tmp, *q;
int value;
tmp = start;
if(start->next!=NULL)
{
start = start->next;
start->prev = NULL;
}
else
start = NULL;
value = tmp->data;
free(tmp);
return value;
}
/*
* return the first element of Doubly Link List
*/
int DoublyLinkedList::peek()
{
struct node *q;
if (start == NULL)
{
cout<<\"List is empty\"<data;
}
}
/*
* Display elements of Doubly Link List
*/
void DoublyLinkedList::display()
{
struct node *q;
if (start == NULL)
{
cout<<\"List is empty\"<data;
q = q->next;
if(q != NULL)
{
cout<<\", \";
}
}
cout<<\"]\"<next;
cnt++;
}
return cnt;
}
/*
* MergeSort - takes two input lists and then based on the.
File LinkedList.java Defines a doubly-l.pdf
File: LinkedList.java
/**
* Defines a doubly-linked list class
*/
import java.util.NoSuchElementException;
public class LinkedList {
private class Node {
private T data;
private Node next;
private Node prev;
public Node(T data) {
this.data = data;
this.next = null;
this.prev = null;
}
}
private int length;
private Node first;
private Node last;
private Node iterator;
/**** CONSTRUCTORS ****/
/**
* Instantiates a new LinkedList with default values
* @postcondition
*/
public LinkedList() {
}
/**
* Converts the given array into a LinkedList
* @param array the array of values to insert into this LinkedList
* @postcondition
*/
public LinkedList(T[] array) {
}
/**
* Instantiates a new LinkedList by copying another List
* @param original the LinkedList to copy
* @postcondition a new List object, which is an identical,
* but separate, copy of the LinkedList original
*/
public LinkedList(LinkedList original) {
}
/**** ACCESSORS ****/
/**
* Returns the value stored in the first node
* @precondition
* @return the value stored at node first
* @throws NoSuchElementException
*/
public T getFirst() throws NoSuchElementException {
return null;
}
/**
* Returns the value stored in the last node
* @precondition
* @return the value stored in the node last
* @throws NoSuchElementException
*/
public T getLast() throws NoSuchElementException {
return null;
}
/**
* Returns the data stored in the iterator node
* @precondition
* @return the data stored in the iterator node
* @throw NullPointerException
*/
public T getIterator() throws NullPointerException {
return null;
}
/**
* Returns the current length of the LinkedList
* @return the length of the LinkedList from 0 to n
*/
public int getLength() {
return -1;
}
/**
* Returns whether the LinkedList is currently empty
* @return whether the LinkedList is empty
*/
public boolean isEmpty() {
return false;
}
/**
* Returns whether the iterator is offEnd, i.e. null
* @return whether the iterator is null
*/
public boolean offEnd() {
return false;
}
/**** MUTATORS ****/
/**
* Creates a new first element
* @param data the data to insert at the front of the LinkedList
* @postcondition
*/
public void addFirst(T data) {
return;
}
/**
* Creates a new last element
* @param data the data to insert at the end of the LinkedList
* @postcondition
*/
public void addLast(T data) {
return;
}
/**
* Inserts a new element after the iterator
* @param data the data to insert
* @precondition
* @throws NullPointerException
*/
public void addIterator(T data) throws NullPointerException{
return;
}
/**
* removes the element at the front of the LinkedList
* @precondition
* @postcondition
* @throws NoSuchElementException
*/
public void removeFirst() throws NoSuchElementException {
return;
}
/**
* removes the element at the end of the LinkedList
* @precondition
* @postcondition
* @throws NoSuchElementException
*/
public void removeLast() throws NoSuchElementException {
return;
}
/**
* removes the element referenced by the iterator
* @precondition
* @pos.
Data Structures in C++I am really new to C++, so links are really .pdf
Data Structures in C++
I am really new to C++, so links are really hard topic for me. It would be nice if you can provide
explanations of what doubly linked lists are and of some of you steps... Thank you
In this assignment, you will implement a doubly-linked list class, together with some list
operations. To make things easier, you’ll implement a list of int, rather than a template class.
Solution
A variable helps us to identify the data. For ex: int a = 5; Here 5 is identified through variable a.
Now, if we have collection of integers, we need some representation to identify them. We call it
array. For ex: int arr[5]
This array is nothing but a Data Structure.
So, a Data Structure is a way to group the data.
There are many Data Structures available like Arrays, Linked List, Doubly-Linked list, Stack,
Queue, etc.
Doubly-Linked list are the ones where you can traverse from the current node both in left and
right directions.
Why so many different types of Data Structures are required ?
Answer is very simple, grouping of data, storage of data and accessing the data is different.
For example, in case of Arrays we store all the data in contiguous locations.
What if we are not able to store the data in contiguous locations because we have huge data.
Answer is go for Linked List/Doubly-Linked list.
Here we can store the data anywhere and link the data through pointers.
I will try to provide comments for the code you have given. May be this can help you.
#pragma once
/*
dlist.h
Doubly-linked lists of ints
*/
#include
class dlist {
public:
dlist() { }
// Here we are creating a NODE, it has a integer value and two pointers.
// One pointer is to move to next node and other to go back to previous node.
struct node {
int value;
node* next;
node* prev;
};
// To return head pointer, i.e. start of the Doubly-Linked list.
node* head() const { return _head; }
// To return Tail pointer, i.e. end of the Doubly-Linked list.
node* tail() const { return _tail; }
// **** Implement ALL the following methods ****
// Returns the node at a particular index (0 is the head).
node* at(int index){
int cnt = 0;
struct node* tmp = head();
while(tmp!=NULL)
{
if (cnt+1 == index)
return tmp;
tmp = tmp->next;
}
}
// Insert a new value, after an existing one
void insert(node *previous, int value){
// check if the given previous is NULL
if (previous == NULL)
{
printf(\"the given previous node cannot be NULL\");
return;
}
// allocate new node
struct node* new_node =(struct node*) malloc(sizeof(struct node));
// put in the data
new_node->data = new_data;
// Make next of new node as next of previous
new_node->next = previous->next;
// Make the next of previous as new_node
previous->next = new_node;
// Make previous as previous of new_node
new_node->prev = previous;
// Change previous of new_node\'s next node
if (new_node->next != NULL)
new_node->next->prev = new_node;
}
// Delete the given node
void del(node* which){
struct node* head_ref = head();
/* base case */
if(*head_ref == NUL.
Juan Williams is a writer with a best selling novel. Juan wishes to .pdf
Juan Williams is a writer with a best selling novel. Juan wishes to create a corporation called
Juan Williams, Inc. He will be the only shareholder. Can Juan incorporate his business of
writing?
Group of answer choices
No, the law does not permit a person to, in effect, incorporate himself.
Yes, this would be the incorporation of a sole proprietorship.
Only if he forms an S Corporation.
No, the law requires at least two people to be shareholders of a corporation..
Juliets Delivery Services complet� las transacciones proporcionadas.pdf
Juliet's Delivery Services complet las transacciones proporcionadas durante mayo de 2019.
Indique los efectos de cada transaccin colocando la letra correspondiente en el espacio
proporcionado.
CartaResultado A Aumento de activo, disminucin de otro activo B Aumento de activo, aumento
de pasivo C Aumento de activos, aumento del patrimonio del propietario D Disminucin del
activo, disminucin del pasivo mi Disminucin del activo, disminucin del patrimonio del
propietario.
More Related Content
Similar to Java AssignmentUsing the ListNode.java file below Write method.pdf
Can somebody solve the TODO parts of the following problem- Thanks D.pdf
Can somebody solve the TODO parts of the following problem.
Thanks
Description
This assignment builds on top of the ListNode class designed and tested in Assignment 4 where
constructionand testing of the ListNode class has already been done. Recall that a ListNode
object contains a data field and a pointer to the next ListNode object.
We now encapsulate the functions to create, search and update the database into a LinkedList
class. There are two members in this class. A pointer called front that points to a ListNode object
and an integer count of the total number of objects currently in the list.
As before, we are not going to use pre-fabricated classes from the c++ library, but construct the
LinkedList ADT from scratch.
We can now use this class to create a LinkedList object which contains a collection of ListNodes
each having a Song object in the data field. The api is put through its paces by initially testing it
on a dummy database containing four songs. The main program then repeats the testing process
with the song list in the file SongData.txt and then again with the song list in the file
SongDataDouble.txt.
The number of steps taken to populate the database for both files is recorded.
Instruction
#This assignment requires you to
Read the Assignment 5 Notes
Watch the Assignment 5 Support video
Implement the following methods of the LinkedList class
-custom constructor
-setters for next pointer and data
Implement the insert, remove and get method in the LinkedListcpp.h file
Scan the given template to find the above //TODO and implement the code needed
//Requires: Song for inserting
//Effects: creates a new ListNode with input value and inserts in proper position (increasing order
of chart position)in the chain. If LinkedList, adds to the beginning
//Modifies: front, if node is added at the beginning.
//Also changes the next pointer of the previous node to point to the newly inserted list node. the
next pointer of the newly inserted pointer points to what was the next of the previous node. This
way both previous and current links are adjusted
//TODO
template <class T>
int LinkedList<T>::insert( T value, SortBy<T> f){
int steps=0;
//TODO
return steps;
}
//Requires: Song title for searching
//Effects: traverses the LinkedList (database) starting from front until the end comparing titles
Returns the original search value if found otherwise returns an empty song with blank title
//Modifies: Nothing
//TODO
template <class T>
T LinkedList<T>::get(T value){
ListNode<T> * current = front;//this may need to change
//TODO
return current->getData();
}
//TODO
template <class T>
int LinkedList<T>::remove(T value){
//TODO
int steps=0;
return steps;
}
/ /Requires: index position of Song to be found
//Effects: traverses the LinkedList starting from front and travels to the index position (if valid)
and returns the song at that index position. Note index position may NOT be the same as chart
position
//Modifies: Nothing
//TODO
template <class T>
T Linke.
Write a JAVA LinkedListRec class that has the following methods siz.pdf
Write a JAVA LinkedListRec class that has the following methods: size, empty, insertBefore,
insertAfter, addAtHead, addAtEnd, remove, replace, peekFront, peekEnd, removeFront,
removeEnd, toString. Use recursion to implement most of these methods. Write a driver to test
your implemented LinkedListRec class methods.
Solution
import java.util.Scanner;
public class LinkedListRec {
int data;
LinkedListRec prev=null,next=null;
int size(LinkedListRec l)//method which returns the length of the list
{
if(l==null)return 0;
return 1+size(l.next);
}
boolean empty(LinkedListRec l)//method checks whether the list is empty or not...
{
if(l==null)return true;
else return false;
}
LinkedListRec insertBefore(LinkedListRec l,int value,int num_insertbefore)//method which
adds a new number before the given number..
{
if(l==null)return l;
if(l.data == num_insertbefore)
{
LinkedListRec n = new LinkedListRec();
n.data = value;
if(l.prev==null)
{
n.next = l;
l=n;
}
else
{
n.prev = l.prev;
n.next= l;
l.prev = n;
}
return l;
}
return insertBefore(l.next,value,num_insertbefore);
}
LinkedListRec insertAfter(LinkedListRec l,int value,int num_insertafter)//method which adds
the new number after the given number
{
if(l==null)return l;
if(l.data == num_insertafter)
{
LinkedListRec n = new LinkedListRec();
n.data = value;
if(l.next==null)
{
l.next = n;
n.prev = l;
}
else
{
n.next = l.next;
l.next.prev = n;
n.prev = l;
}
return l;
}
return insertAfter(l.next,value,num_insertafter);
}
LinkedListRec addAtHead(LinkedListRec l,int value)//method which adds a new number at
the head position of the list...
{
LinkedListRec n = new LinkedListRec();
n.data=value;
n.next = l;
l=n;
return l;
}
LinkedListRec addAtEnd(LinkedListRec l,int value)//method which adds a new number at
the end position of the list...
{
if(l==null){ l = new LinkedListRec();l.data = value;return l;}
if(l.next==null)
{
LinkedListRec n = new LinkedListRec();
n.data=value;
n.prev = l;
l.next = n;
return l;
}
return addAtEnd(l.next,value);
}
LinkedListRec remove(LinkedListRec l,int value)//method which removes given numbet
from the list....
{
if(l==null)return l;
if(l.data == value)
{
if(l.prev!=null){
l.prev = l.next;
}
else
l=l.next;
return l;
}
return remove(l.next,value);
}
boolean replace(LinkedListRec l,int value,int newvalue)//method which replaces current
number with new number,...
{
if(l==null)return false;
if(l.data == value)
{
l.data = newvalue;
return true;
}
return replace(l.next,value,newvalue);
}
int peekFront(LinkedListRec l)//method which returns the first value of the list...
{
if(l!=null)
return l.data;
else return -1;
}
int peekEnd(LinkedListRec l)//method which returns the last value of the list........
{
if(l==null)return -1;
if(l.next == null)return l.data;
return peekEnd(l.next);
}
LinkedListRec removeFront(LinkedListRec l)//method which removes the first element of the
list..
{
if(l==null)return l;
l=l.next;
return l;
}
boolean removeEnd(LinkedListRec l)//method which removes the last element o.
Dividing a linked list into two sublists of almost equal sizesa. A.pdf
Dividing a linked list into two sublists of almost equal sizes
a. Add the operation divideMid to the class linkedListType as follows:
Consider the following statements:
unorderedLinkedList myList;
unorderedLinkedList subList;
Suppose myList points to the list with elements 34 65 27 89 12 (in this order). The statement:
myList.divideMid(subList); divides myList into two sublists: myList points to the list with the
elements 34 65 27,
and subList points to the sublist with the elements 89 12.
b. Write the definition of the function template to implement the operation divideMid. Also,
write a program to test your function. The header files linkedList.h and unorderedLinkedList.h
are supplied. Your test program should produce output similar to this:
Turn in:
linkedList.h with modifications
Your test program.
(C++)
Required code is below:
#ifndef H_UnorderedLinkedList
#define H_UnorderedLinkedList
#include \"linkedList.h\"
using namespace std;
template
class unorderedLinkedList: public linkedListType
{
public:
bool search(const Type& searchItem) const;
//Function to determine whether searchItem is in the list.
//Postcondition: Returns true if searchItem is in the
// list, otherwise the value false is
// returned.
void insertFirst(const Type& newItem);
//Function to insert newItem at the beginning of the list.
//Postcondition: first points to the new list, newItem is
// inserted at the beginning of the list,
// last points to the last node in the
// list, and count is incremented by 1.
void insertLast(const Type& newItem);
//Function to insert newItem at the end of the list.
//Postcondition: first points to the new list, newItem
// is inserted at the end of the list,
// last points to the last node in the
// list, and count is incremented by 1.
void deleteNode(const Type& deleteItem);
//Function to delete deleteItem from the list.
//Postcondition: If found, the node containing
// deleteItem is deleted from the list.
// first points to the first node, last
// points to the last node of the updated
// list, and count is decremented by 1.
};
template
bool unorderedLinkedList::
search(const Type& searchItem) const
{
nodeType *current; //pointer to traverse the list
bool found = false;
current = this->first; //set current to point to the first
//node in the list
while (current != NULL && !found) //search the list
if (current->info == searchItem) //searchItem is found
found = true;
else
current = current->link; //make current point to
//the next node
return found;
}//end search
template
void unorderedLinkedList::insertFirst(const Type& newItem)
{
nodeType *newNode; //pointer to create the new node
newNode = new nodeType; //create the new node
newNode->info = newItem; //store the new item in the node
newNode->link = this->first; //insert newNode before first
this->first = newNode; //make first point to the
//actual first node
this->count++; //increment count
if (this->last == NULL) //if the list was empty, newNode is also
//the last node in the list
this->l.
Lecture 18Dynamic Data Structures and Generics (II).docx
Lecture 18
Dynamic Data Structures and Generics (II)
*
*
Class ArrayListObject of an ArrayList can be used to store an unlimited number of objects.
*
Methods of ArrayList (I)
*
java.util.ArrayList
+ArrayList()
+add(o: Object) : void
+add(index: int, o: Object) : void
+clear(): void
+contains(o: Object): boolean
+get(index: int) : Object
+indexOf(o: Object) : int
+isEmpty(): boolean
+lastIndexOf(o: Object) : int
+remove(o: Object): boolean
+size(): int
+remove(index: int) : Object
+set(index: int, o: Object) : Object
Appends a new element o at the end of this list.
Adds a new element o at the specified index in this list.
Removes all the elements from this list.
Returns true if this list contains the element o.
Returns the element from this list at the specified index.
Returns the index of the first matching element in this list.
Returns true if this list contains no elements.
Returns the index of the last matching element in this list.
Removes the element o from this list.
Returns the number of elements in this list.
Removes the element at the specified index.
Sets the element at the specified index.
Creates an empty list.
Methods of ArrayList (II) Array is used to implement the methodsMethods get(int index) and set(int index, Object o) for accessing and modifying an element through an index and the add(Object o) for adding an element at the end of the list are efficient. Why?Methods add(int index, Object o) and remove(int index) are inefficient because it requires shifting potentially a large number of elements.
*
Linked Data StructureTo improve efficiency for adding and removing an element anywhere in a list.It containsCollection of objectsEach object contains data and a reference to another object in the collection
*
Linked ListA dynamic data structureA linked list consists of nodes. Each node contains an elementa link: linked to its next neighbor. Example: take notes in the class!
*
Linked List
*
ListNodes
ListNodes in Linked List
public class ListNode { // fill the comments
private String data; //
private ListNode link; //
/** */
public ListNode () {
link = null; //
data = null; //
}
/** */
public ListNode (String newData, ListNode linkValue) {
data = newData;
link = linkValue;
}
*
ListNodes in Linked List (cont’d)
/** */
public void setData (String newData) {
data = newData;
}
/** */
public String getData () {
return data;
...
Write a method expand that could be added to the LinkedlntList class f.docx
Write a method expand that could be added to the LinkedlntList class from lecture and section. The method accepts an integer fas a parameter and replaces every value/with f copies of the value (i/f). Suppose a LinkedlntList variable list stores the following values: [21, 8, 15, 0, -_3, 32] The call list.expand(3); would change the list to store the following elements: \\7. 7. 7. 2. 2. 2. 5. 5. 5. 0. 0. 0. -1. -1. -1. 10. 10. 101 If an element of the original list is not evenly divisible by f, as with 8 and 32 above, the resulting list should truncate any fractional component (as is done naturally by integer division). If the parameter value passed is 1, the list is unchanged. If it is 0 or negative, the list should become empty. For full credit, your solution must run in O(N) time where N is the length of the list. You may not call any methods of the linked list class to solve this problem, and you may not use any auxiliary data structure to solve this problem (such as an array, ArrayList, Queue, String, etc). Assume that you are using the LinkedlntList and ListNode class as defined in lecture and section: public class LinkedlntList { private ListNode front; methods public class ListNode { public int data;//data stored in this node public ListNode next;//a link to the next node in the list public ListNode() {...} public ListNode(int data) {...} public ListNode(int data, ListNode next) {...}
Solution
//Function:
public void expand(int f)
{
ListNode ptr = start;
ListNode prev;
while(ptr!=null)
{
prev=ptr.getLink();
//get the existing data
int i=ptr.getData();
// find quotient
int v=i/f;
//replace existing data with quotient
ptr.setData(v);
//f-1 times expanding the same node
for(int i=0;i<f-1;i++)
{
//create new node with quotient value
ListNode nptr = new ListNode(v, null);
// attach to list
ptr.setLink(nptr);
ptr=nptr.getLink();
}
ptr.setLink(prev);
// moving to the next node in the original list
ptr=prev;
}
}
.
Write a method expand that could be added to the LinkedlntList class .docx
Write a method expand that could be added to the LinkedlntList class
Data Structures and Agorithm: DS 04 Linked List.pptx
Data Structures and Agorithm: DS 04 Linked List.pptx
In java.Write a class called GenDoubleLinkedList which is a generi.pdf
In java.
Write a class called GenDoubleLinkedList which is a generic double linked list. This link list is
similar to the single linked list that was shown in class except that each node in addition to
having data and nextLink (which was originally called link) now has prevLink.
The class GenDoubleLinkedList needs to have the following:
Internal class ListNode which hasInstance Variables
data of type T
nextLink of type ListNode
prevLink of type ListNode
Constructors
Default
Parameterized
Instance Variables
head of type ListNode which always points to the beginning of the linked list
current of type ListNode which moves around pointing to one of the nodes
Constructor
A default constructor that initializes head to an empty ListNode and sets current to point at the
head.
Methods
goToNext – This moves the current node forward in the list by one node. It doesn’t move
forward if that node is null
goToPrev – This moves the current node backwards in the list by one node. It doesn’t move
backwards if that node is null.
getDataAtCurrent – returns the data at the current node as long as the current isn’t null
setDataAtCurrent – takes in a parameter and sets the data at the current node to that value as long
as current is not null
insertNodeAfterCurrent – creates a new node based on data that is passed in by a parameter and
puts that node after the current position
deleteCurrentNode – removes the current node from the list by resetting the links
showList – prints out the contents of the list line-by-line
inList – returns a true or false value based on whether or not the data passed in via a parameter is
in the list
Solution
package com.quad.generic;
public class GenDoubleLinkedList {
private ListNode head;
private ListNode tail;
private int size;
public int getSize() {
return size;
}
/**
*
*/
public GenDoubleLinkedList() {
this.head = null;
this.size = 0;
}
@SuppressWarnings(\"hiding\")
class ListNode{
private T data;
private ListNode nextLink;
private ListNode prevLink;
/**
*
*/
public ListNode() {
nextLink=null;
prevLink=null;
data=null;
}
/**
* @param data
* @param nextLink
* @param prevLink
*/
public ListNode(T data, ListNode nextLink,
ListNode prevLink) {
super();
this.data = data;
this.nextLink = nextLink;
this.prevLink = prevLink;
}
public T getData() {
return data;
}
public void setData(T data) {
this.data = data;
}
public ListNode getNextLink() {
return nextLink;
}
public void setNextLink(ListNode nextLink) {
this.nextLink = nextLink;
}
public ListNode getPrevLink() {
return prevLink;
}
public void setPrevLink(ListNode prevLink) {
this.prevLink = prevLink;
}
}
public void goToNext(){
ListNode temp = head;
while(temp != null){
temp = temp.getNextLink();
}
}
public void goToPrev() {
ListNode temporary = tail;
while(temporary != null){
temporary = temporary.getPrevLink();
}
}
public T getDataAtCurrent (int index) {
if (index < 0 || index >= size) {
throw new IndexOutOfBoundsException();
} else {
ListNode current = head;
for (int i = 0; i < index; i.
Select three methods in the ObjectList class to work through algori.pdf
Select three methods in the ObjectList class to work through algorithmically. Describe any
special cases or boundary conditions that might exist for each of the three methods selected. Be
sure to draw pictures as you work through the methods. Remember that you cannot work on
linked lists without drawing pictures. The homework will not be accepted without submitting the
pictures! Write a Java method with the signature: public objectList intersect (objectList list1,
objectList list2) that accepts two unordered linear linked lists and returns a third linear linked list
whose nodes contains the intersection of the two original linear linked lists. Note that the
intersection of two lists is a new list containing the elements that the two lists have in common,
without modifying the two original lists. Describe any boundary conditions that might exist.
Solution
Node.java
//Defines each node of a linked list
public class Node{
int data;
Node next;
Node(int d)
{
data = d;
next = null;
}
}
ObjectList.java
public class ObjectList{
public Node head;
/* Utility function to print list */
public void printList()
{
Node temp = head;
while(temp != null)
{
System.out.print(temp.data+\" \");
temp = temp.next;
}
System.out.println();
}
/* Inserts a node at start of linked list */
public void push(int new_data)
{
/* 1 & 2: Allocate the Node &
Put in the data*/
Node new_node = new Node(new_data);
/* 3. Make next of new Node as head */
new_node.next = head;
/* 4. Move the head to point to new Node */
head = new_node;
}
/* A utilty function that returns true if data is present
in linked list else return false */
public boolean isPresent (int data){
Node t = this.head;
while (t != null)
{
if (t.data == data)
return true;
t = t.next;
}
return false;
}
}
Intersection.java
//Implements the intersection method.
class Intersection{
static public ObjectList intersect(ObjectList list1, ObjectList list2){
ObjectList result = new ObjectList();
//Node t1 = head1;
Node t1 = list1.head;
Node t2 = list2.head;
// Traverse list1 and search each element of it in list2.
// If the element is present in list 2, then insert the
// element to result
while (t1 != null){
if (list2.isPresent(t1.data))
result.push(t1.data);
t1 = t1.next;
}
return result;
}
/* Driver program to test above functions */
public static void main(String args[]){
ObjectList llist1 = new ObjectList();
ObjectList llist2 = new ObjectList();
ObjectList unin = new ObjectList();
ObjectList intersecn = new ObjectList();
/*create a linked lits 10->15->5->20 */
llist1.push(20);
llist1.push(4);
llist1.push(15);
llist1.push(10);
/*create a linked lits 8->4->2->10 */
llist2.push(10);
llist2.push(2);
llist2.push(4);
llist2.push(8);
intersecn = intersect(llist1, llist2);
intersecn.printList();
}
}.
Write an algorithm that reads a list of integers from the keyboard, .pdf
Write an algorithm that reads a list of integers from the keyboard, creates
a list of them using linked list implementation, and prints the result
Solution
/*
Algorithm:
Implementation of linked list.
Create a node type class which will hold an integer and next pointer to point to another node.
Create a constructor which will construct an object of type node with the integer type data as the
only parameter
and initializing next pointer to NULL.
Create LinkedList class which will only have head pointer.
Create a constructor which will initialize this head pointer to NULL.
Create a append method which will recieve an input of type integer from the user and append it
to LinkedList
using below steps:
1.Create a Node type object.
1.IF head is NULL assign a Node type object created in 1st step.
2.IF head is not NULL then traverse to the end of the linked list till you found a Node which has
next pointer
set to NULL.
3.Add Node type object created in first step to the next pointer of last node.
Create a print method which will traverse the list from the head of the linked list to the last
node(Node
with next pointer NULL) and while traversing it will keep printing the node data.
Get the userinput:
Ask user for integer continously till user input -1 and append all the integers to the linked list.
*/
PROGRAM:
#include
using namespace std;
class Node
{
public:
int data;
Node *next;
Node(int data)
{
this->data = data;
this->next = NULL;
}
};
class LinkedList
{
private:
Node *head;
public:
LinkedList()
{
head = NULL;
}
void addToFront(int data)
{
Node *temp = new Node(data);
if(head == NULL)
head = temp;
else
{
temp->next = head;
head = temp;
}
}
void append(int data)
{
Node *temp = new Node(data);
Node *current = head;
if(current == NULL)
{
head = temp;
return;
}
while(current->next != NULL)
{
current = current->next;
}
current->next = temp;
}
void print()
{
Node *current = head;
if(current == NULL)
cout << \"No element in list. \ \";
while(current != NULL)
{
cout << current->data << \" \";
current = current->next;
}
cout << endl;
}
void deleteLinkedList()
{
Node *prev;
Node *current = head;
while(current!=NULL)
{
prev = current;
current = current->next;
delete prev;
}
}
void deleteLastNode()
{
Node *current = head;
Node *prev = NULL;
if(current == NULL)
return;
while(current->next != NULL)
{
prev = current;
current = current->next;
}
if(prev == NULL)
{
delete current;
head = NULL;
}
else
{
prev->next = NULL;
delete current;
}
}
~LinkedList()
{
deleteLinkedList();
}
};
int main()
{
LinkedList list;
int data;
while(1)
{
cout << \"Enter the integer(-1 to Quit) : \";
cin >> data;
if(data==-1)
break;
list.append(data);
}
cout << \"Content of LinkedList is : \";
list.print();
return 0;
}
OUTPUT:
Enter the integer(-1 to Quit) : 1
Enter the integer(-1 to Quit) : 2
Enter the integer(-1 to Quit) : 3
Enter the integer(-1 to Quit) : 4
Enter the integer(-1 to Quit) : -1
Content of LinkedList is : 1 2 3 4.
There are a couple of new methods that you will be writing for this pr.pdf
There are a couple of new methods that you will be writing for this project. Some are easy, some
are hard. I have provided code that tests most of the methods by calling them from the main
method in the file ListTest.java. The test file will only work when you have done all the
methods. In COMP182LinkedList.java I have provided the signature (definition and input
parameters) for these methods. At this point to make sure you can run the file
(COMP182LinkedList.java that you downloaded from Cavas) I have added template values as
return types of the methods. For example, if the method returns an int then I added return 0 as the
return value. Here are the methods are as follows: Anything getFixst () Anything getLast () void
add (Anything value) void addafter (1nt index, Anyehtng value) Anything set(int index,
Rnything aewvalue) void removeAl1 (Anything vaiue) lastIndex (Anything value)
COMP182IinkedIi ateAnything; elone boolean equala (object in) CoMP182IinkedList
KAnythang? gplat () boolean hascycle () Node reveraeliat () Node oddeventiat () Node
deleteDuplicates () boolean ispalindrome () "For the last two methods, you need to add proper
testing to ListTest Java Method Specifications Here are more details for implementing each of
these methods. You need to complete all the following methods in the COMP182LinkedList
class. You can write the methods in any order you wish, but I suggest you do them in the order
they are listed. In particular, make sure all your methods work for empty lists, lists of different
sizes, etc as you can see from the sample test cases provided in ListTest.java. While grading your
project, we will make changes to these values! Also, make sure that your solutions do not modify
the original lists (unless you are specifically instructed to do so). roid main(String[] args) You
can use this method in the ListTest class to create lists as needed and test each of the methods
listed above. I have provided a few test cases, but you may want to add more to some of the
method tests. Until you get add working, you will need to use addFirst to create lists to test your
other methods. Anything getFirsto This method returns the value stored in the first node an the
list. It should prit an error message and seturn null if the list is empty. Anything getLasto This
method returns the value stored in the last node in the list. It should print an error mesiage and
retuin noll if the list is emipty. void add(Anything value) Thus method adds a nade containing
new yalue to the end of the last. This method returns the value stored in the first node in the list.
It should print an error message and return null if the list is empty. Anything getLast0 This
method returns the value stored in the last node in the list. It should print an error message and
retum null if the list is empty: void add(Anything value) This method adds a node containing
new value to the end of the list. void addAfter(int index, Anything value) This method adds a
node contai.
Write a function to merge two doubly linked lists. The input lists ha.pdf
Write a function to merge two doubly linked lists. The input lists have their elements in sorted
order, from lowest to highest. The output list should also be sorted from lowest to highest. Your
algorithm should run in linear time on the length of the output list. Provide an algorithm for your
function Implement and show some samples of your running function
Solution
The algorithm for LinkedList MergeSort is as follows.
The trick in this algorithm is to use a local list to store the value which is pointing to the actual
list to be returned as a result of the function
Step1: START
Step2: GET inputs of list1 and list2
Step3: INITIALIZE mergelist
STEP4: SET mylist = mergelist
Step5: WHILE list1 OR list2 is EMPTY
DO
IF (list1 AND list2) are NOT EMPTY
IF list1.value > list2.value
mylist.next = list2
ELSE
mylist.next = list1
ELSE IF list1 is EMPTY
mylist.next = list2
ELSE
mylist.next = list1
Step6: RETURN mergelist
Step7: STOP
Sample program for the same implemented in C++
//====================================================================
========
// Name : DoublyLinkedList.cpp
// Author : Kaju
// Version : 0.1
// Copyright : This is just an example code
// Description : MergeSort in C++, Ansi-style
//====================================================================
========
/*
* C++ Program to Implement Doubly Linked List
*/
#include
#include
#include
/*
* Node Declaration
*/
using namespace std;
// struct declaration for node which will hold the integer data with links to previous data and next
data
struct node
{
int data;
struct node *next;
struct node *prev;
};
/*
Class Declaration
*/
class DoublyLinkedList
{
private:
struct node *start; // collection of all the nodes
public:
void create(int value);
int peek();
int delete_head();
void display();
int count();
void mergeSort(DoublyLinkedList list1, DoublyLinkedList list2);
DoublyLinkedList()
{
start = NULL;
}
};
/*
* Add data into the list
*/
void DoublyLinkedList::create(int value)
{
struct node *s, *temp;
temp = new(struct node);
temp->data = value;
temp->next = NULL;
if (start == NULL)
{
temp->prev = NULL;
start = temp;
}
else
{
s = start;
while (s->next != NULL)
s = s->next;
s->next = temp;
temp->prev = s;
}
}
/*
* Deletion of the first element from the list
* store the first element in a temp node and then remove it from start.
*/
int DoublyLinkedList::delete_head()
{
struct node *tmp, *q;
int value;
tmp = start;
if(start->next!=NULL)
{
start = start->next;
start->prev = NULL;
}
else
start = NULL;
value = tmp->data;
free(tmp);
return value;
}
/*
* return the first element of Doubly Link List
*/
int DoublyLinkedList::peek()
{
struct node *q;
if (start == NULL)
{
cout<<\"List is empty\"<data;
}
}
/*
* Display elements of Doubly Link List
*/
void DoublyLinkedList::display()
{
struct node *q;
if (start == NULL)
{
cout<<\"List is empty\"<data;
q = q->next;
if(q != NULL)
{
cout<<\", \";
}
}
cout<<\"]\"<next;
cnt++;
}
return cnt;
}
/*
* MergeSort - takes two input lists and then based on the.
File LinkedList.java Defines a doubly-l.pdf
File: LinkedList.java
/**
* Defines a doubly-linked list class
*/
import java.util.NoSuchElementException;
public class LinkedList {
private class Node {
private T data;
private Node next;
private Node prev;
public Node(T data) {
this.data = data;
this.next = null;
this.prev = null;
}
}
private int length;
private Node first;
private Node last;
private Node iterator;
/**** CONSTRUCTORS ****/
/**
* Instantiates a new LinkedList with default values
* @postcondition
*/
public LinkedList() {
}
/**
* Converts the given array into a LinkedList
* @param array the array of values to insert into this LinkedList
* @postcondition
*/
public LinkedList(T[] array) {
}
/**
* Instantiates a new LinkedList by copying another List
* @param original the LinkedList to copy
* @postcondition a new List object, which is an identical,
* but separate, copy of the LinkedList original
*/
public LinkedList(LinkedList original) {
}
/**** ACCESSORS ****/
/**
* Returns the value stored in the first node
* @precondition
* @return the value stored at node first
* @throws NoSuchElementException
*/
public T getFirst() throws NoSuchElementException {
return null;
}
/**
* Returns the value stored in the last node
* @precondition
* @return the value stored in the node last
* @throws NoSuchElementException
*/
public T getLast() throws NoSuchElementException {
return null;
}
/**
* Returns the data stored in the iterator node
* @precondition
* @return the data stored in the iterator node
* @throw NullPointerException
*/
public T getIterator() throws NullPointerException {
return null;
}
/**
* Returns the current length of the LinkedList
* @return the length of the LinkedList from 0 to n
*/
public int getLength() {
return -1;
}
/**
* Returns whether the LinkedList is currently empty
* @return whether the LinkedList is empty
*/
public boolean isEmpty() {
return false;
}
/**
* Returns whether the iterator is offEnd, i.e. null
* @return whether the iterator is null
*/
public boolean offEnd() {
return false;
}
/**** MUTATORS ****/
/**
* Creates a new first element
* @param data the data to insert at the front of the LinkedList
* @postcondition
*/
public void addFirst(T data) {
return;
}
/**
* Creates a new last element
* @param data the data to insert at the end of the LinkedList
* @postcondition
*/
public void addLast(T data) {
return;
}
/**
* Inserts a new element after the iterator
* @param data the data to insert
* @precondition
* @throws NullPointerException
*/
public void addIterator(T data) throws NullPointerException{
return;
}
/**
* removes the element at the front of the LinkedList
* @precondition
* @postcondition
* @throws NoSuchElementException
*/
public void removeFirst() throws NoSuchElementException {
return;
}
/**
* removes the element at the end of the LinkedList
* @precondition
* @postcondition
* @throws NoSuchElementException
*/
public void removeLast() throws NoSuchElementException {
return;
}
/**
* removes the element referenced by the iterator
* @precondition
* @pos.
Data Structures in C++I am really new to C++, so links are really .pdf
Data Structures in C++
I am really new to C++, so links are really hard topic for me. It would be nice if you can provide
explanations of what doubly linked lists are and of some of you steps... Thank you
In this assignment, you will implement a doubly-linked list class, together with some list
operations. To make things easier, you’ll implement a list of int, rather than a template class.
Solution
A variable helps us to identify the data. For ex: int a = 5; Here 5 is identified through variable a.
Now, if we have collection of integers, we need some representation to identify them. We call it
array. For ex: int arr[5]
This array is nothing but a Data Structure.
So, a Data Structure is a way to group the data.
There are many Data Structures available like Arrays, Linked List, Doubly-Linked list, Stack,
Queue, etc.
Doubly-Linked list are the ones where you can traverse from the current node both in left and
right directions.
Why so many different types of Data Structures are required ?
Answer is very simple, grouping of data, storage of data and accessing the data is different.
For example, in case of Arrays we store all the data in contiguous locations.
What if we are not able to store the data in contiguous locations because we have huge data.
Answer is go for Linked List/Doubly-Linked list.
Here we can store the data anywhere and link the data through pointers.
I will try to provide comments for the code you have given. May be this can help you.
#pragma once
/*
dlist.h
Doubly-linked lists of ints
*/
#include
class dlist {
public:
dlist() { }
// Here we are creating a NODE, it has a integer value and two pointers.
// One pointer is to move to next node and other to go back to previous node.
struct node {
int value;
node* next;
node* prev;
};
// To return head pointer, i.e. start of the Doubly-Linked list.
node* head() const { return _head; }
// To return Tail pointer, i.e. end of the Doubly-Linked list.
node* tail() const { return _tail; }
// **** Implement ALL the following methods ****
// Returns the node at a particular index (0 is the head).
node* at(int index){
int cnt = 0;
struct node* tmp = head();
while(tmp!=NULL)
{
if (cnt+1 == index)
return tmp;
tmp = tmp->next;
}
}
// Insert a new value, after an existing one
void insert(node *previous, int value){
// check if the given previous is NULL
if (previous == NULL)
{
printf(\"the given previous node cannot be NULL\");
return;
}
// allocate new node
struct node* new_node =(struct node*) malloc(sizeof(struct node));
// put in the data
new_node->data = new_data;
// Make next of new node as next of previous
new_node->next = previous->next;
// Make the next of previous as new_node
previous->next = new_node;
// Make previous as previous of new_node
new_node->prev = previous;
// Change previous of new_node\'s next node
if (new_node->next != NULL)
new_node->next->prev = new_node;
}
// Delete the given node
void del(node* which){
struct node* head_ref = head();
/* base case */
if(*head_ref == NUL.
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2
3
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