Part 1: Project Setup, Building the View/UI
In the video below, some initial steps are given to setup the GUI for the project as well as the
main entry point for the application.
Part 2: The IDialLock Interface
Note: All classes and interfaces you develop in Part 2 of the assignment should be placed in the
"model" package.
Develop an interface for a three-digit dial combination lock. The interface should be named
IDialLock and should export the following abstract methods:
void reset() - resets the lock dial back to 0.
void left(int t) - turns the lock left by the specified number of ticks t.
void right(int t) - turns the lock right by the specified number of ticks t.
int currentTick() - returns the tick number the dial is pointing to between 0..maxTicks.
boolean pull() - attempts to pull open the lock; the method returns true if successful false in all
other cases.
The lock opens if one performs the following sequence of turns:
right(..) to the first secret digit,
then left(..) to the second secret digit,
then right(..) to the third secret digit.
The image below is a rough illustration of the sort of dial lock you'll be building:
2.1: A "Helper Class" Representing Dial Turns
Before you implement the interface above, add the following helper class to the model package:
This class represents a single turn of the dial. It encapsulates the direction the dial was turned
(either left or right) along with the digit that the dial stopped on after the turn was completed.
2.2: Developing a "Tracking" Implementation of the IDialLock Interface
Now create another class (in the model package) called: TrLockImpl. This particular
implementation will 'track' the history of turns each time the left(..) or right(..) methods are called
in order to determine whether or not the lock will open (i.e.: when pull(..) is finally called).
To get started, make your class implement the IDialLock interface. The IDE should prompt you
to insert 'default / stub' implementations of the abstract methods in the interface.
Next, add the following fields to the class:
1. int maxTicks - this stores an upper bound on the digits around the lock.
2. int s1, s2, s3 - these are the three secret digits needed to open the lock.
3. int currentTick - the number the lock's dial is currently pointing towards (between
0..maxTicks).
4. List moves - this will store the history of turns made; so each time the left(..) or right(..)
methods are called, this list will increase in length by one.
Be sure to use appropriate access modifiers when defining the above fields.
Now add a constructor that accepts four ints as parameters:
s1, s2, and s3, and mTicks - these represent the three secret digits needed to open the lock, while
mTicks is the upper bound on the number of digits around the lock.
If any of these are negative, then throw a new IllegalArgumentException("secret digits cannot be
negative").
Important note: when initializing the maxTicks field within the constructor, do it this way:
this.maxT.
Mcq 15-20Q15Which of the following trees are binary search trAbramMartino96
Mcq 15-20
Q15:
Which of the following trees are binary search trees?
. all of them
Q16:
Which of the following trees are binary search trees?
. all of them
Q17:
. all of them
Q18:
It is forbidden to place both private and abstract in front of a method declaration.
. true
. false
Q19:
Consider the binary search tree below:
What is the post-order path of this binary search tree?
Remember this in the post-order walk: First, we go through the left subtree. Then we cross the right subtree. Finally, we visit the root.
Q20:
Consider the following two classes:
After executing the code, we will have the following display:
Mcqs 7- ?
Q7:
Suppose A is an interface, B is a class that realizes interface A, and C is a class that extends class B.
Consider the following code:
Which of the test () method statements will print true to standard output?
Reminder: The java.lang.Object.getClass () method returns the runtime class of an object.
Q8:
Which ArrayList declaration is appropriate for a list that contains values of type float?
Q9:
What does the following method do in the context of a simply linked list?
. The method removes all nodes from the linked list.
. The method traverses the linked list without modifying it.
. The method reverses the linked list.
. The method removes every other node from the linked list.
Q10:
Suppose we have a single-linked sorted list whose nodes contain integer values. What is the mystery () method for in the following code snippet?
Question 10 options:
.The method removes every other node from the linked list.
.This method removes duplicates from the linked lis
.The method traverses the linked list without modifying it.
Q11:
Complete lines 27 and 28 of the following implementation (blanks 1 and 2) so that addLast (E value) adds a value to the end (back) of the doubly linked list.
Q12:
Consider the following doubly linked list. The values saved in the list are integers.
Now, suppose we run the tweak () method, shown below, on this doubly linked list.
Starting from the node designated by head, how will the values of the nodes be read after executing tweak ()?
Q13:
Consider a simply linked list. We want to write a private recursive method, E size (Node <E> current), to calculate the size of the list starting with the node designated by head via the public E size () method (also shown in the snippet below).
Which of the following choices corresponds to a correct implementation of the E size (Node <E> current) method?
Q13 options :
Q14:
The following List interface declares a subset of the methods of the java.util.List interface.
public interface List <E> {
void add ( int index , E elem ) ;
E remove (int index ) ;
boolean remove (E obj ) ;
int size ( ) ;
boolean isEmpty ( ) ;
//autres méthodes
}
For implementing this interface using an array, ArrayList.
Question 14 options:
.Insertions at intermediate positions in the list are always quick.
.Removing an item is always quick.
.Consulting the i ...
How to capture a variable in C# and not to shoot yourself in the footPVS-Studio
Back in 2005, with the release of C# 2.0 standard we got a possibility to pass a variable to the body of an anonymous delegate by capturing it from the current context. In 2008 the C# 3.0 brought us lambdas, user anonymous classes, LINQ requests and much more. Now it January, 2017 and the majority of C# developers are looking forward to the release of the C# 7.0 standard that should provide us a bunch of new useful features. However, there are still old features that need to be fixed. That's why there are plenty of ways to shoot yourself in the foot. Today we are going to speak about one of them, and it is related with quite an unobvious mechanism of variable capture in the body of anonymous functions in C#.
How to capture a variable in C# and not to shoot yourself in the footSofia Fateeva
Back in 2005, with the release of C# 2.0 standard we got a possibility to pass a variable to the body of an anonymous delegate by capturing it from the current context. In 2008 the C# 3.0 brought us lambdas, user anonymous classes, LINQ requests and much more. Now it January, 2017 and the majority of C# developers are looking forward to the release of the C# 7.0 standard that should provide us a bunch of new useful features. However, there are still old features that need to be fixed. That's why there are plenty of ways to shoot yourself in the foot. Today we are going to speak about one of them, and it is related with quite an unobvious mechanism of variable capture in the body of anonymous functions in C#.
Miranda NG Project to Get the "Wild Pointers" Award (Part 1) Andrey Karpov
I have recently got to the Miranda NG project and checked it with the PVS-Studio code analyzer. And I'm afraid this is the worst project in regard to memory and pointers handling issues I've ever seen. Although I didn't study the analysis results too thoroughly, there still were so many errors that I had to split the material into 2 articles. The first of them is devoted to pointers and the second to all the rest stuff. Enjoy reading and don't forget your popcorn.
Mcq 15-20Q15Which of the following trees are binary search trAbramMartino96
Mcq 15-20
Q15:
Which of the following trees are binary search trees?
. all of them
Q16:
Which of the following trees are binary search trees?
. all of them
Q17:
. all of them
Q18:
It is forbidden to place both private and abstract in front of a method declaration.
. true
. false
Q19:
Consider the binary search tree below:
What is the post-order path of this binary search tree?
Remember this in the post-order walk: First, we go through the left subtree. Then we cross the right subtree. Finally, we visit the root.
Q20:
Consider the following two classes:
After executing the code, we will have the following display:
Mcqs 7- ?
Q7:
Suppose A is an interface, B is a class that realizes interface A, and C is a class that extends class B.
Consider the following code:
Which of the test () method statements will print true to standard output?
Reminder: The java.lang.Object.getClass () method returns the runtime class of an object.
Q8:
Which ArrayList declaration is appropriate for a list that contains values of type float?
Q9:
What does the following method do in the context of a simply linked list?
. The method removes all nodes from the linked list.
. The method traverses the linked list without modifying it.
. The method reverses the linked list.
. The method removes every other node from the linked list.
Q10:
Suppose we have a single-linked sorted list whose nodes contain integer values. What is the mystery () method for in the following code snippet?
Question 10 options:
.The method removes every other node from the linked list.
.This method removes duplicates from the linked lis
.The method traverses the linked list without modifying it.
Q11:
Complete lines 27 and 28 of the following implementation (blanks 1 and 2) so that addLast (E value) adds a value to the end (back) of the doubly linked list.
Q12:
Consider the following doubly linked list. The values saved in the list are integers.
Now, suppose we run the tweak () method, shown below, on this doubly linked list.
Starting from the node designated by head, how will the values of the nodes be read after executing tweak ()?
Q13:
Consider a simply linked list. We want to write a private recursive method, E size (Node <E> current), to calculate the size of the list starting with the node designated by head via the public E size () method (also shown in the snippet below).
Which of the following choices corresponds to a correct implementation of the E size (Node <E> current) method?
Q13 options :
Q14:
The following List interface declares a subset of the methods of the java.util.List interface.
public interface List <E> {
void add ( int index , E elem ) ;
E remove (int index ) ;
boolean remove (E obj ) ;
int size ( ) ;
boolean isEmpty ( ) ;
//autres méthodes
}
For implementing this interface using an array, ArrayList.
Question 14 options:
.Insertions at intermediate positions in the list are always quick.
.Removing an item is always quick.
.Consulting the i ...
How to capture a variable in C# and not to shoot yourself in the footPVS-Studio
Back in 2005, with the release of C# 2.0 standard we got a possibility to pass a variable to the body of an anonymous delegate by capturing it from the current context. In 2008 the C# 3.0 brought us lambdas, user anonymous classes, LINQ requests and much more. Now it January, 2017 and the majority of C# developers are looking forward to the release of the C# 7.0 standard that should provide us a bunch of new useful features. However, there are still old features that need to be fixed. That's why there are plenty of ways to shoot yourself in the foot. Today we are going to speak about one of them, and it is related with quite an unobvious mechanism of variable capture in the body of anonymous functions in C#.
How to capture a variable in C# and not to shoot yourself in the footSofia Fateeva
Back in 2005, with the release of C# 2.0 standard we got a possibility to pass a variable to the body of an anonymous delegate by capturing it from the current context. In 2008 the C# 3.0 brought us lambdas, user anonymous classes, LINQ requests and much more. Now it January, 2017 and the majority of C# developers are looking forward to the release of the C# 7.0 standard that should provide us a bunch of new useful features. However, there are still old features that need to be fixed. That's why there are plenty of ways to shoot yourself in the foot. Today we are going to speak about one of them, and it is related with quite an unobvious mechanism of variable capture in the body of anonymous functions in C#.
Miranda NG Project to Get the "Wild Pointers" Award (Part 1) Andrey Karpov
I have recently got to the Miranda NG project and checked it with the PVS-Studio code analyzer. And I'm afraid this is the worst project in regard to memory and pointers handling issues I've ever seen. Although I didn't study the analysis results too thoroughly, there still were so many errors that I had to split the material into 2 articles. The first of them is devoted to pointers and the second to all the rest stuff. Enjoy reading and don't forget your popcorn.
A lot of you may have seen “Futurama” and remember the main characters - Bender, Fry, Leela and others, who are constantly getting in some troubles and find creative ways to get out of them. Interestingly, the software that was used for creation of this cartoon is now available in the net. The developers from PVS-Studio team couldn’t miss a chance to check this project. And they were really lucky – the project had a large variety of bugs of medium and high severity.
hello- please dont just copy from other answers- the following is the.docxIsaac9LjWelchq
hello. please dont just copy from other answers, the following is the code that is already have and can u modified it for the following instructions.
instructions ----A LinkNode structure or class which will have two attributes -
a data attribute, and
a pointer attribute to the next node.
The data attribute of the LinkNode should be a reference/pointer of the Currency class of Lab 2.
Do not make it an inner class or member structure to the SinglyLinkedList class of #2 below.
A SinglyLinkedList class which will be composed of three attributes -
a count attribute,
a LinkNode pointer/reference attribute named as and pointing to the start of the list and
a LinkNode pointer/reference attribute named as and pointing to the end of the list.
Since this is a class, make sure all these attributes are private.
The class and attribute names for the node and linked list are the words in bold in #1 and #2.
For the Linked List, implement the following linked-list behaviors as explained in class -
getters/setters/constructors/destructors, as needed, for the attributes of the class.
createList method in addition to the constructor - this is optional for overloading purposes.
destroyList method in place of or in addition to the destructor - this is optional for overloading purposes,
addCurrency method which takes a Currency object and a node index value as parameters to add the Currency to the list at that index.
removeCurrency method which takes a Currency object as parameter and removes that Currency object from the list and may return a copy of the Currency.
removeCurrency overload method which takes a node index as parameter and removes the Currency object at that index and may return a copy of the Currency.
findCurrency method which takes a Currency object as parameter and returns the node index at which the Currency is found in the list.
getCurrency method which takes an index values as a parameter and returns the Currency object.
printList method which returns a string of all the Currency objects in the list in the order of index, tab spaced.
isListEmpty method which returns if a list is empty or not.
countCurrency method which returns a count of Currency nodes in the list.
Any other methods you think would be useful in your program.
A Stack class derived from the SinglyLinkedList but with no additional attributes and the usual stack methods -
constructor and createStack (optional) methods,
push which takes a Currency object as parameter and adds it to the top of the stack.
pop which takes no parameter and removes and returns the Currency object from the top of the stack.
peek which takes no parameter and returns a copy of the Currency object at the top of the stack.
printStack method which returns a string signifying the contents of the stack from the top to bottom, tab spaced.
destructor and/or destroyStack (optional) methods.
Ensure that the Stack objects do not allow Linked List functions to be used on them.
A Queue class derived from the SinglyLink.
P1 El ni�o _________ aparentemente result� ileso y tranquilo despu�.pdfamazing2001
P1: El nio _________ aparentemente result ileso y tranquilo despus de caerse de su bicicleta.
R: ansioso
B: resistente
C: cauteloso
D: prspero
ES: inmaduro
P2: La maestra esperaba ________ dentro de sus alumnos un sentido de responsabilidad por
ellos mismos y por su comunidad.
R: revocar
B: inculcar
C: abogado
D: prolongar
ES: introspeccin
P3: Por lo general, un partidario ________ de su equipo, el fantico fue inusualmente _______
acerca de asistir al partido inaugural porque el pronstico anunciaba fuertes lluvias.
A: ferviente .. ambivalente
B: comprometido .. entusiasta
C: tibio .. reacio
D: rabioso.. silencioso
E: franco .. tranquilo
P4: El volumen ms reciente de la revista ________ su nmero actual; el prximo nmero no saldr
hasta el prximo ao
R: desordenado
B: introducido
C: realizado
D: concluido
mi: alcanzado.
P1 Las organizaciones gastan mucho dinero en permitir que los emple.pdfamazing2001
P1: Las organizaciones gastan mucho dinero en permitir que los empleados resuelvan problemas
de forma colectiva. Pero inducir una mayor colaboracin en realidad puede obstaculizar la parte
ms importante de la resolucin de problemas: resolver el problema de verdad. Deberan las
organizaciones dejar que sus empleados trabajen individualmente? (10)
P2: Discuta las implicaciones para el lugar de trabajo. En tu opinin que opinas? (10) Lmite de
palabras de cada pregunta: 400 palabras.
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Similar to Part 1 Project Setup, Building the ViewUIIn the video belo.pdf
A lot of you may have seen “Futurama” and remember the main characters - Bender, Fry, Leela and others, who are constantly getting in some troubles and find creative ways to get out of them. Interestingly, the software that was used for creation of this cartoon is now available in the net. The developers from PVS-Studio team couldn’t miss a chance to check this project. And they were really lucky – the project had a large variety of bugs of medium and high severity.
hello- please dont just copy from other answers- the following is the.docxIsaac9LjWelchq
hello. please dont just copy from other answers, the following is the code that is already have and can u modified it for the following instructions.
instructions ----A LinkNode structure or class which will have two attributes -
a data attribute, and
a pointer attribute to the next node.
The data attribute of the LinkNode should be a reference/pointer of the Currency class of Lab 2.
Do not make it an inner class or member structure to the SinglyLinkedList class of #2 below.
A SinglyLinkedList class which will be composed of three attributes -
a count attribute,
a LinkNode pointer/reference attribute named as and pointing to the start of the list and
a LinkNode pointer/reference attribute named as and pointing to the end of the list.
Since this is a class, make sure all these attributes are private.
The class and attribute names for the node and linked list are the words in bold in #1 and #2.
For the Linked List, implement the following linked-list behaviors as explained in class -
getters/setters/constructors/destructors, as needed, for the attributes of the class.
createList method in addition to the constructor - this is optional for overloading purposes.
destroyList method in place of or in addition to the destructor - this is optional for overloading purposes,
addCurrency method which takes a Currency object and a node index value as parameters to add the Currency to the list at that index.
removeCurrency method which takes a Currency object as parameter and removes that Currency object from the list and may return a copy of the Currency.
removeCurrency overload method which takes a node index as parameter and removes the Currency object at that index and may return a copy of the Currency.
findCurrency method which takes a Currency object as parameter and returns the node index at which the Currency is found in the list.
getCurrency method which takes an index values as a parameter and returns the Currency object.
printList method which returns a string of all the Currency objects in the list in the order of index, tab spaced.
isListEmpty method which returns if a list is empty or not.
countCurrency method which returns a count of Currency nodes in the list.
Any other methods you think would be useful in your program.
A Stack class derived from the SinglyLinkedList but with no additional attributes and the usual stack methods -
constructor and createStack (optional) methods,
push which takes a Currency object as parameter and adds it to the top of the stack.
pop which takes no parameter and removes and returns the Currency object from the top of the stack.
peek which takes no parameter and returns a copy of the Currency object at the top of the stack.
printStack method which returns a string signifying the contents of the stack from the top to bottom, tab spaced.
destructor and/or destroyStack (optional) methods.
Ensure that the Stack objects do not allow Linked List functions to be used on them.
A Queue class derived from the SinglyLink.
P1 El ni�o _________ aparentemente result� ileso y tranquilo despu�.pdfamazing2001
P1: El nio _________ aparentemente result ileso y tranquilo despus de caerse de su bicicleta.
R: ansioso
B: resistente
C: cauteloso
D: prspero
ES: inmaduro
P2: La maestra esperaba ________ dentro de sus alumnos un sentido de responsabilidad por
ellos mismos y por su comunidad.
R: revocar
B: inculcar
C: abogado
D: prolongar
ES: introspeccin
P3: Por lo general, un partidario ________ de su equipo, el fantico fue inusualmente _______
acerca de asistir al partido inaugural porque el pronstico anunciaba fuertes lluvias.
A: ferviente .. ambivalente
B: comprometido .. entusiasta
C: tibio .. reacio
D: rabioso.. silencioso
E: franco .. tranquilo
P4: El volumen ms reciente de la revista ________ su nmero actual; el prximo nmero no saldr
hasta el prximo ao
R: desordenado
B: introducido
C: realizado
D: concluido
mi: alcanzado.
P1 Las organizaciones gastan mucho dinero en permitir que los emple.pdfamazing2001
P1: Las organizaciones gastan mucho dinero en permitir que los empleados resuelvan problemas
de forma colectiva. Pero inducir una mayor colaboracin en realidad puede obstaculizar la parte
ms importante de la resolucin de problemas: resolver el problema de verdad. Deberan las
organizaciones dejar que sus empleados trabajen individualmente? (10)
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palabras de cada pregunta: 400 palabras.
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Ortega and colleagues (2017) discovered that, of ~3,400 Blue-footed .pdfamazing2001
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4. Explain the choices for the chosen company that are related to the 9
strategic staffing decisions:
Core or Flexible Workforce
Internal or external hiring
Hire for or train and develop skills
Replace or retain talent
Staff proactively or reactively
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Centralised or decentalised?
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The Roman Empire, a vast and enduring power, stands as one of history's most remarkable civilizations, leaving an indelible imprint on the world. It emerged from the Roman Republic, transitioning into an imperial powerhouse under the leadership of Augustus Caesar in 27 BCE. This transformation marked the beginning of an era defined by unprecedented territorial expansion, architectural marvels, and profound cultural influence.
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Under Augustus, the empire experienced the Pax Romana, a 200-year period of relative peace and stability. Augustus reformed the military, established efficient administrative systems, and initiated grand construction projects. The empire's borders expanded, encompassing territories from Britain to Egypt and from Spain to the Euphrates. Roman legions, renowned for their discipline and engineering prowess, secured and maintained these vast territories, building roads, fortifications, and cities that facilitated control and integration.
The Roman Empire’s society was hierarchical, with a rigid class system. At the top were the patricians, wealthy elites who held significant political power. Below them were the plebeians, free citizens with limited political influence, and the vast numbers of slaves who formed the backbone of the economy. The family unit was central, governed by the paterfamilias, the male head who held absolute authority.
Culturally, the Romans were eclectic, absorbing and adapting elements from the civilizations they encountered, particularly the Greeks. Roman art, literature, and philosophy reflected this synthesis, creating a rich cultural tapestry. Latin, the Roman language, became the lingua franca of the Western world, influencing numerous modern languages.
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Part 1 Project Setup, Building the ViewUIIn the video belo.pdf
1. Part 1: Project Setup, Building the View/UI
In the video below, some initial steps are given to setup the GUI for the project as well as the
main entry point for the application.
Part 2: The IDialLock Interface
Note: All classes and interfaces you develop in Part 2 of the assignment should be placed in the
"model" package.
Develop an interface for a three-digit dial combination lock. The interface should be named
IDialLock and should export the following abstract methods:
void reset() - resets the lock dial back to 0.
void left(int t) - turns the lock left by the specified number of ticks t.
void right(int t) - turns the lock right by the specified number of ticks t.
int currentTick() - returns the tick number the dial is pointing to between 0..maxTicks.
boolean pull() - attempts to pull open the lock; the method returns true if successful false in all
other cases.
The lock opens if one performs the following sequence of turns:
right(..) to the first secret digit,
then left(..) to the second secret digit,
then right(..) to the third secret digit.
The image below is a rough illustration of the sort of dial lock you'll be building:
2.1: A "Helper Class" Representing Dial Turns
Before you implement the interface above, add the following helper class to the model package:
This class represents a single turn of the dial. It encapsulates the direction the dial was turned
(either left or right) along with the digit that the dial stopped on after the turn was completed.
2.2: Developing a "Tracking" Implementation of the IDialLock Interface
Now create another class (in the model package) called: TrLockImpl. This particular
implementation will 'track' the history of turns each time the left(..) or right(..) methods are called
in order to determine whether or not the lock will open (i.e.: when pull(..) is finally called).
To get started, make your class implement the IDialLock interface. The IDE should prompt you
2. to insert 'default / stub' implementations of the abstract methods in the interface.
Next, add the following fields to the class:
1. int maxTicks - this stores an upper bound on the digits around the lock.
2. int s1, s2, s3 - these are the three secret digits needed to open the lock.
3. int currentTick - the number the lock's dial is currently pointing towards (between
0..maxTicks).
4. List moves - this will store the history of turns made; so each time the left(..) or right(..)
methods are called, this list will increase in length by one.
Be sure to use appropriate access modifiers when defining the above fields.
Now add a constructor that accepts four ints as parameters:
s1, s2, and s3, and mTicks - these represent the three secret digits needed to open the lock, while
mTicks is the upper bound on the number of digits around the lock.
If any of these are negative, then throw a new IllegalArgumentException("secret digits cannot be
negative").
Important note: when initializing the maxTicks field within the constructor, do it this way:
this.maxTicks = mTicks + 1 (this is to account for the fact that the dial starts from index 0 -- and
will generally make some of the logic in the methods more straightforward).
Next, override the toString() method such that your TrLockImpl is rendered in string form like
so:
(where, as usual, the [..] are just placeholders denoting which field to print and where)
Before we get into defining the methods, below is a another example illustrating the tracking
implementation's behavior:
2.3: Tracking Implementation Methods
Here are some hints/pseudocode for the methods of the tracking implementation, these methods
should all be overridden from the IDialLock interface:
reset() - should just set currentTick back to 0 and clear out the moves list.
left(int t):
right(int t):
pull():
This method is more complicated due to the fact that many consecutive right and left turns can
be used to open the lock. In particular, the method needs to verify that:
first: only right turns were made, stopping at s1
- second: only left turns were made, stopping at s2
- and third: only right turns were made, finally stopping at s3
To motivate a strategy for implementing this method, consider the following. THIS IS NOT THE
3. CODE YOU PUT IN THE PULL METHOD (this just goes in a Tester.java file to see if your
pull method works):
By the time lock.pull() is called on the last line above, the lock object's move list -- if one were
to examine it in the debugger -- would look like this:
(R-2, e.g., is the toString representation of a Turn object and can be read as: "Right turn that
stopped on digit 2")
One possible way of determining whether the lock should be opened (given just the above list of
Turn objects to work with) is to partition the moves list into three separate lists:
Once you've managed to get the turns into these three lists, one could then say:
An additional check should verify that none of the three lists above are empty. If any are, then
return false -- as this would imply that someone skipped a required left or right turn sequence.
Lastly, you'd want to return true from the method only if:
Keep in mind the above is pseudocode.. e.g.: if you want to get the last element of
firstRightTurns, you need to use the list .get(..) method; so you'd say something along the lines:
firstRightTurns.get(INDEX-OF-LAST).stopDigit == s1.
The following is an example of a moves list that should NOT result in true getting returned from
the pull() method:
This will moves list would get partitioned into the three sublists like so:
Notice the length of all these three lists does not sum to the length of this.moves. Moreover, the
last element in each of the three lists above does match the three secret (for the first list, the stop
digit would need to be 3, for the second list, the stop digit would need to be 1, etc).
Part 3: Adding Controller Logic
The controller code you'll need in this assignment is fairly minimal. Each button on the form
developed in the getting started video is a one-to-one match with the various abstract methods
provided by the IDialLock interface. You need to attach "event handling" lambda expressions to
each one (calling the appropriate IDialLock model methods and updating the view accordingly).
For example, here is the event handling logic attached to the "left" button on the form:
Note that we're passing a lambda expression into the addActionListener(..) method.
We can do this because the addActionListener(..) method being called expects something of
interface-type ActionListener to be passed in. The ActionListener is a functional interface that is
a part of swing. I.e.: the interface only exports a single abstract method: actionPerformed(Event
e). So the lambda expression we're passing in is an implementation of the ActionListener's
actionPerformed(..) method.
Each button should will have a separate lambda attached to it that calls methods from the
IDialLock model and updates the various labels based on how the model changes. Below is an
example the UI in action:
4. Image Description
Some notes on the UI shown above:
you can change the color of the text displayed by some JLabel, exampleLabel, by writing:
exampleLabel.setForeground(Color.RED) -- other colors exist too, like Color.GREEN;
you can make a dialog box get displayed (like the message shown in the picture above on the
left) by writing: JOptionPane.showMessageDialog(view, "MSG GOES HERE") -- you only want
to do this if someone clicks "pull" and the lock fails to open.