This document provides an overview of Java's collections framework. It discusses the main interfaces like Collection, Set, List, and Map. It also describes some common implementations like ArrayList, LinkedList, HashSet, TreeMap. The key characteristics of lists, sets, and maps are explained. Lists maintain element order and allow duplicates. Sets do not allow duplicates. Maps contain unique keys that map to values. The document also covers common collection operations and using iterators to traverse elements.
Collections Framework is a unified architecture for managing collections, Main Parts of Collections Framework
1. Interfaces :- Core interfaces defining common functionality exhibited by collections
2. Implementations :- Concrete classes of the core interfaces providing data structures
3. Operations :- Methods that perform various operations on collections
This presentation introduces some concepts about the Java Collection framework. These slides introduce the following concepts:
- Collections and iterators
- Linked list and array list
- Hash set and tree set
- Maps
- The collection framework
The presentation is took from the Java course I run in the bachelor-level informatics curriculum at the University of Padova.
Collections Framework is a unified architecture for managing collections, Main Parts of Collections Framework
1. Interfaces :- Core interfaces defining common functionality exhibited by collections
2. Implementations :- Concrete classes of the core interfaces providing data structures
3. Operations :- Methods that perform various operations on collections
This presentation introduces some concepts about the Java Collection framework. These slides introduce the following concepts:
- Collections and iterators
- Linked list and array list
- Hash set and tree set
- Maps
- The collection framework
The presentation is took from the Java course I run in the bachelor-level informatics curriculum at the University of Padova.
To learn important concept of Collection and its handling plus its advantages and different class & child class of Collection and their implementations. Important interview questions of the collection.
Java Collections | Collections Framework in Java | Java Tutorial For Beginner...Edureka!
**** Java Certification Training: https://www.edureka.co/java-j2ee-soa-training ****
This Edureka tutorial on “Java Collections” will talk about the complete hierarchy of Collections Frameworks in Java. It will walk you through the various fundamentals of collections like Lists, Queue, Sets, Interfaces etc. Through this tutorial you will learn the following topics:
Java Collection Framework
Collection Framework Hierarchy
Interfaces
List
Queue
Set
Check out our Java Tutorial blog series: https://goo.gl/osrGrS
Check out our complete Youtube playlist here: https://goo.gl/gMFLx3
In this core java training session, you will learn Collections – Lists, Sets. Topics covered in this session are:
• List – ArrayList, LinkedList
• Set – HashSet, LinkedHashSet, TreeSet
For more information about this course visit on this link: https://www.mindsmapped.com/courses/software-development/learn-java-fundamentals-hands-on-training-on-core-java-concepts/
( ** Java Certification Training: https://www.edureka.co/java-j2ee-soa-training ** )
This Edureka tutorial on “Java ArrayList” (Java blog series: https://goo.gl/osrGrS) will give you a brief insight about ArrayList in Java and its various constructors and methods along with an example. Through this tutorial, you will learn the following topics:
Collections Framework
Hierarchy of ArrayList
What is ArrayList
Internal Working of ArrayList
Constructors of ArrayList
Constructors Example
ArrayList Methods
Methods Example and Demo
Advantages of ArrayList over Arrays
Check out our Java Tutorial blog series: https://goo.gl/osrGrS
Check out our complete Youtube playlist here: https://goo.gl/CRbgFann
Follow us to never miss an update in the future.
Instagram: https://www.instagram.com/edureka_learning/
Facebook: https://www.facebook.com/edurekaIN/
Twitter: https://twitter.com/edurekain
LinkedIn: https://www.linkedin.com/company/edureka
HashMap is a part of Java's collection.. It provides the basic implementation of Map interface of Java. It stores the data in (Key, Value) pairs. To access a value key should be known. This ppt dives deep into the internal working of Hashmaps.
Collections and its types in C# (with examples)Aijaz Ali Abro
Learn step by step c# collections with easy examples. Learn generic, non-generic and specialized collections along with easy and great examples. Learn about arraylist, queue class,stack class and more. Difference between generic and non-generic collections. Difference between arraylist and simple array.
To learn important concept of Collection and its handling plus its advantages and different class & child class of Collection and their implementations. Important interview questions of the collection.
Java Collections | Collections Framework in Java | Java Tutorial For Beginner...Edureka!
**** Java Certification Training: https://www.edureka.co/java-j2ee-soa-training ****
This Edureka tutorial on “Java Collections” will talk about the complete hierarchy of Collections Frameworks in Java. It will walk you through the various fundamentals of collections like Lists, Queue, Sets, Interfaces etc. Through this tutorial you will learn the following topics:
Java Collection Framework
Collection Framework Hierarchy
Interfaces
List
Queue
Set
Check out our Java Tutorial blog series: https://goo.gl/osrGrS
Check out our complete Youtube playlist here: https://goo.gl/gMFLx3
In this core java training session, you will learn Collections – Lists, Sets. Topics covered in this session are:
• List – ArrayList, LinkedList
• Set – HashSet, LinkedHashSet, TreeSet
For more information about this course visit on this link: https://www.mindsmapped.com/courses/software-development/learn-java-fundamentals-hands-on-training-on-core-java-concepts/
( ** Java Certification Training: https://www.edureka.co/java-j2ee-soa-training ** )
This Edureka tutorial on “Java ArrayList” (Java blog series: https://goo.gl/osrGrS) will give you a brief insight about ArrayList in Java and its various constructors and methods along with an example. Through this tutorial, you will learn the following topics:
Collections Framework
Hierarchy of ArrayList
What is ArrayList
Internal Working of ArrayList
Constructors of ArrayList
Constructors Example
ArrayList Methods
Methods Example and Demo
Advantages of ArrayList over Arrays
Check out our Java Tutorial blog series: https://goo.gl/osrGrS
Check out our complete Youtube playlist here: https://goo.gl/CRbgFann
Follow us to never miss an update in the future.
Instagram: https://www.instagram.com/edureka_learning/
Facebook: https://www.facebook.com/edurekaIN/
Twitter: https://twitter.com/edurekain
LinkedIn: https://www.linkedin.com/company/edureka
HashMap is a part of Java's collection.. It provides the basic implementation of Map interface of Java. It stores the data in (Key, Value) pairs. To access a value key should be known. This ppt dives deep into the internal working of Hashmaps.
Collections and its types in C# (with examples)Aijaz Ali Abro
Learn step by step c# collections with easy examples. Learn generic, non-generic and specialized collections along with easy and great examples. Learn about arraylist, queue class,stack class and more. Difference between generic and non-generic collections. Difference between arraylist and simple array.
Collections in .net technology (2160711)Janki Shah
Collections in .NET Framework.
- What is collections?
- Needs of Collections/ importance of collection
- various most useful classes of collection such as
ArrayList, Hashtable, Stack, Queue, BitArray, SortedList
In this session you will learn:
List – ArrayList, LinkedList
Set – HashSet, LinkedHashSet, TreeSet
For more information: https://www.mindsmapped.com/courses/software-development/become-a-java-developer-hands-on-training/
Welcome to WIPAC Monthly the magazine brought to you by the LinkedIn Group Water Industry Process Automation & Control.
In this month's edition, along with this month's industry news to celebrate the 13 years since the group was created we have articles including
A case study of the used of Advanced Process Control at the Wastewater Treatment works at Lleida in Spain
A look back on an article on smart wastewater networks in order to see how the industry has measured up in the interim around the adoption of Digital Transformation in the Water Industry.
Water scarcity is the lack of fresh water resources to meet the standard water demand. There are two type of water scarcity. One is physical. The other is economic water scarcity.
Saudi Arabia stands as a titan in the global energy landscape, renowned for its abundant oil and gas resources. It's the largest exporter of petroleum and holds some of the world's most significant reserves. Let's delve into the top 10 oil and gas projects shaping Saudi Arabia's energy future in 2024.
Democratizing Fuzzing at Scale by Abhishek Aryaabh.arya
Presented at NUS: Fuzzing and Software Security Summer School 2024
This keynote talks about the democratization of fuzzing at scale, highlighting the collaboration between open source communities, academia, and industry to advance the field of fuzzing. It delves into the history of fuzzing, the development of scalable fuzzing platforms, and the empowerment of community-driven research. The talk will further discuss recent advancements leveraging AI/ML and offer insights into the future evolution of the fuzzing landscape.
Vaccine management system project report documentation..pdfKamal Acharya
The Division of Vaccine and Immunization is facing increasing difficulty monitoring vaccines and other commodities distribution once they have been distributed from the national stores. With the introduction of new vaccines, more challenges have been anticipated with this additions posing serious threat to the already over strained vaccine supply chain system in Kenya.
Quality defects in TMT Bars, Possible causes and Potential Solutions.PrashantGoswami42
Maintaining high-quality standards in the production of TMT bars is crucial for ensuring structural integrity in construction. Addressing common defects through careful monitoring, standardized processes, and advanced technology can significantly improve the quality of TMT bars. Continuous training and adherence to quality control measures will also play a pivotal role in minimizing these defects.
CFD Simulation of By-pass Flow in a HRSG module by R&R Consult.pptxR&R Consult
CFD analysis is incredibly effective at solving mysteries and improving the performance of complex systems!
Here's a great example: At a large natural gas-fired power plant, where they use waste heat to generate steam and energy, they were puzzled that their boiler wasn't producing as much steam as expected.
R&R and Tetra Engineering Group Inc. were asked to solve the issue with reduced steam production.
An inspection had shown that a significant amount of hot flue gas was bypassing the boiler tubes, where the heat was supposed to be transferred.
R&R Consult conducted a CFD analysis, which revealed that 6.3% of the flue gas was bypassing the boiler tubes without transferring heat. The analysis also showed that the flue gas was instead being directed along the sides of the boiler and between the modules that were supposed to capture the heat. This was the cause of the reduced performance.
Based on our results, Tetra Engineering installed covering plates to reduce the bypass flow. This improved the boiler's performance and increased electricity production.
It is always satisfying when we can help solve complex challenges like this. Do your systems also need a check-up or optimization? Give us a call!
Work done in cooperation with James Malloy and David Moelling from Tetra Engineering.
More examples of our work https://www.r-r-consult.dk/en/cases-en/
3. COLLECTION FRAMEWORK
The collections framework define a set of interfaces and their
implementations to manipulate collection.
The collection framework also allows us to store , retrieve, and update
a set of objects.
It reduces programming effort while increasing performance.
It provides an API to work with the data structure, such as lists , tree,
maps, and sets.
3
4. The collection framework which is contained in the java.util
package is one of java’s most powerful sub-systems.
It includes implementations of these interfaces and algorithms
to manipulate them.
Which server as a container for a group of object such as a set of
words in a dictionary or a collection.
4
6. WHAT IS A COLLECTION?
A Collection (also known as container) is an object that contains
a group of objects treated as a single unit.
Any type of objects can be stored, retrieved and manipulated as
elements of collections.
6
7. COLLECTIONS FRAMEWORK
Collections Framework is a unified architecture for
managing collections
Main Parts of Collections Framework
1. Interfaces
Core interfaces defining common functionality exhibited by collections
1. Implementations
Concrete classes of the core interfaces providing data structures
1. Operations
Methods that perform various operations on collections
7
8. COLLECTIONS FRAMEWORK INTERFACES
Collection specifies contract that all collections should implement.
Set defines functionality for a set of unique elements.
SortedSet defines functionality for a set where elements are sorted.
List defines functionality for an ordered list of non- unique elements.
Map defines functionality for mapping of unique keys to values.
SortedMap defines functionality for a map where its keys are sorted.
Core Interface Description
8
9. COLLECTIONS FRAMEWORK
IMPLEMENTATIONS
Set List Map
HashSet ArrayList HashMap
LinkedHashSet LinkedList LinkedHashMap
TreeSet Vector Hashtable
Tree Map
Note: Hashtable uses a lower-case “t”
9
10. OPERATIONS
Basic collection operations:-
• Check if collection is empty.
• Check if an object exists in collection.
• Retrieve an object from collection.
• Add object to collection. 10
11. • Remove object from collection
• Iterate collection and inspect each object
• Each operation has a corresponding method implementation
for each collection type
11
12. COLLECTIONS CHARACTERISTICS
Ordered :-
Elements are stored and accessed in a specific order.
Sorted :-
Elements are stored and accessed in a sorted order.
Indexed :-
Elements can be accessed using an index.
Unique :-
Collection does not allow duplicates.
12
13. ITERATOR
The Iterator interface enables us to sequentially traverse
and access the elements contained in a collection .
The elements of a collection can be accessed using the
methods defined by the Iterator interface.
Syntax:
Iterator <variable> = <CollectionObject>.iterator();
13
14. Method Defined in the Iterator Interface
Method Description
hasNext() :- Return true if the collection contains more then one element.
next() :- Returns the next element form the collection.
remove() :- Remove the current element from the collection.
14
15. COLLECTIONS HIERARCHY
SET AND LIST
Collection
Set List
Implements
HashSet
SortedSet
Implements
extends
LimkedHashSet TreeSet LinkedList Vector ArrayList
extends
Implements
Implements
15
17. COLLECTION IMPLEMENTATIONS
List:- List of things(classes that implement List)
Set:-Unique things(classes that implement set)
Map:-Things with a unique ID(classes that implement Map)
17
18. LIST IMPLEMENTATIONS
ARRAY LIST
Import java.util.ArrayList;
public class MyArrayList {
public static void main(string args[ ]) {
ArrayList alist=new ArrayList( );
alist.add(new string(“one”) );
alist.add(new string(“two”) );
alist.add(new string(“three”) );
system.out.println(alist.get(0) );
system.out.println(alist.get(1) );
system.out.println(alist.get(2) );
}
}
One
Two
Three
19
26. MAP IMPLEMENTATIONS HASH MAP
import java.util.HashMap;
public class MyHashMap {
public static void main(String args[
]) {
HashMap map = new HashMap( );
map.put("name", "Jody");
map.put("id", new Integer(446));
map.put("address", "Manila");
System.out.println("Name:"+
map.get("name"));
System.out.println("ID: " +
map.get("id"));
System.out.println("Address: " +
map.get("address"));
}
}
Name: Jody
ID: 446
Address: Manila
27
27. MAP IMPLEMENTATIONS
HASH TABLE
import java.util.Hashtable;
public class MyHashtable {
public static void main(String args[ ]) {
Hashtable table = new Hashtable( );
table.put("name", "Jody");
table.put("id", new Integer(1001));
table.put("address", new String("Manila"));
System.out.println("Table of Contents:" +
table);
}
} Table of Contents:
{address=Manila, name=Jody, id=1001}28
28. MAP IMPLEMENTATIONS
LINKED HASH MAP
import java.util.*;
public class MyLinkedHashMap {
public static void main(String args[ ])
{
int iNum = 0;
LinkedHashMap myMap = new
LinkedHashMap( );
myMap.put("name", "Jody");
myMap.put("id", new Integer(446));
myMap.put("address", "Manila");
myMap.put("type", "Savings");
Collection values = myMap.values( );
Iterator iterator = values.iterator( );
while(iterator.hasNext()) {
System.out.println(iterator.next( ));
}
}
}
Jody
446
Manila
Savings
29
29. MAP IMPLEMENTATIONS
TREE MAP
import java.util.*;
public class MyTreeMap {
public static void main(String args[]) {
TreeMap treeMap = new TreeMap( );
treeMap.put("name", "Jody");
treeMap.put("id", new Integer(446));
treeMap.put("address", "Manila");
Collection values = treeMap.values()
Iterator iterator = values.iterator( );
System.out.println("Printing the
VALUES....");
while (iterator.hasNext()) {
System.out.println(iterator.next( ));
}
}
}
Printing theVALUES....
Manila
446
Jody
30
30. COLLECTION CLASSES SUMMARY
Class Map Set List Ordered Sorted
HashMap X No No
Hashtable X No No
TreeMap X Sorted By natural order or
custom comparison rules
LinkedHashmap X By insertion order or No
last access order
HashSet X No No
TreeSet X Sorted By natural order or
custom comparison rules
LinkedHashSet X By insertion order or No
last access order
ArrayList X By Index No
Vector X By Index No
LinkedList X By Index No
31
31. KEY POINTS
Collections Framework contains:
1. Interfaces
2. Implementations
3. Operations
A list cares about the index.
A set cares about uniqueness, it does not allow
duplicates.
A map cares about unique identifiers.
32