Rock-paper-scissors :- java problem

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Reference no: EM131151

1: Rock-Paper-Scissors : Simple.java

Problems 1-3 are based on the Rock-Paper-Scissors game. If you are unfamiliar with the game, please see en.wikipedia.org/wiki/Rock-paper-scissors.

You will implement two di erent rock-paper-scissors players by extending the RPS class that is provided in culearn. Download this class and read through the class. You will find
three abstract methods that you must implement. Pre and Postconditions for these methods are included in the RPS.java le provided.

Write a Java class called Simple that extends the provided RPS class. Your class must implement all of the abstract methods found in the RPS class according to the following
guidelines:

1. The gesture() method will always output the same value each time it is called. The value (String) returned will be the same as the name of the current object (as defi ned
in the constructor; see below). Thus, the name of the object must be one of \Rock", \Paper" or \Scissors".

2. The update() method must update the current players statistics (stats) as speci ed by the pre/postconditions in the RPS class.

3. The toString() method must be implemented according to the speci cation in the RPS class.

Your class must have the following constructor:

public Simple(String name, byte id){...}

where name will be both the players name and the kind of gesture it always returns. If the constructor is called with a name that is not one of \Rock", \Paper" or \Scissors", your
constructor will automatically change the name to \Paper".

Do not add any other public attributes, methods or constructors to your class. Do not include a main method in your class.

2: Rock-Paper-Scissors : Clever.java

Write a Java class called Clever that extends the provided RPS class. Your class must implement all of the abstract methods found in the RPS class according to the following
guidelines:

1. The gesture() method will output one of \Rock", \Paper" or \Scissors", based on the arti cial intelligence that you add to you method.

If a series of games are being played between two players, the two arrays of Strings that are input to the method give the history of gestures played so far between the
players. You may want to use this information when choosing which gesture to play.

You may add any hidden (private) attributes or methods that you need to help you.

You will not receive any correctness or design marks if your class outputs the same gesture each time or if your class returns a random gesture each time. You must add
some 'intelligence' to it.

2. The update() method must update the current players statistics (stats) as speci ed in the RPS class. This method should also update any hidden (private) attributes that
you have added to your class.

3. The toString() method must be implemented according to the speci cation in the RPS class. (This will be the same method from your Simple class. You do not have to
do anything di erently here.)

Your class must have the following constructor:

public Simple(String name, byte id){...}

where name will be the name of your player.

Do not add any other public attributes, methods or constructors to your class. (Do add private attributes and/or methods to help you!) Do not include a main method in your class.

3: Rock-Paper-Scissors Challenge

Rename your Clever class with another name of your choice. We will take all submissions for the bonus and play a rock-paper-scissors tournament and your grade will be determined by how well your players does against the rest of the class.

You must change every instance of \Clever" in your class to your new class name. Your new class name should be unique in the class (you do not have to use any personal identifying information; but you may if you wish). Follow these guidelines:

1. Do not use simple or obvious names like MyRPS, MyPlayer, AwesomePlayer, Clever1, MyClever, etc. These names would likely be chosen by several people (and any two
classes with the same name will cause delays in grading).

2. Be creative but do not use any o ensive names.

3. Don't use extremely long or short names.

You must also create a text le called name.txt that contains a single line. That single line must be the name of your class.

4: Stack ADT

Consider the following abstract data type:

String Stack

data                                                  operations
a collection of strings                       - add a string to the collection
(need not be unique)                       - remove a string from the collection using LIFO principle
                                                        - ask if the collection is empty or not
                                                        - ask what the next string removed would be
                                                        - ask how many strings are in the collection

A stack corresponds to the natural notion of a stack that we have. For example, if you look at a stack of plates (see link) you would normally add a new plate to the stack at the
top of the stack. When you remove a plate, you would remove the top plate which will have been the last one added. (Assume that you only add/remove one plate at a time.)

Even though an ADT does not specify how the data will eventually be stored, using the above notion of a stack of plates, we will use the word top to denote the position of the last added item to the stack. So when you add something to the stack, you put it on the top of the stack. And when you remove an element from a stack, you remove it from the top. Similaraly, when you look at which item would be removed next, you look at the top of the stack.

Write a Java class called StringStack, which implements the string stack ADT given above. Your implementation must have the following attribute, methods and constructor:

public static final boolean bonus = false;
public void push(String element){...}
public String pop(){...}
public String peek(){...}
public boolean isEmpty(){...}
public int size()
public StringStack(){...}

The contracts (pre and postconditions) for the methods are listed at the end of this question. There should be no other public attributes, methods or constructors in your class.
You may add any private attributes or methods as you need.

You may not use any of Java's classes (like ArrayList or any of the Stack classes) in your solution. You will receive zero marks for this problem if you do. If you are unsure if you are violating this condition please ask (Piazza). You may use arrays.

Your stack must be able to hold at least 1024 strings in it. For bonus marks, implement your stack so that it can have an arbitrarily large number of strings in it (i.e. the size should only be constrained by the amount of memory your program is given to run). If you do the bonus part of the assignment, you must change the value of static attribute bonus to true. We will not test your code for the bonus parts unless this variable is true.

5: Testing Stack ADT

Write a Java class called TestStringStack, which tests your StringStack class.

Your testing progeam should provide test cases to show that the public methods of the StringStack class are working properly. Your program should display to standard output
some useful information during the tests and a summary at the end. The summary should include how many tests were performed and how many passed/failed.

At the end of your TestStringStack.java le, include a comment block describing at least 5 (di erent) text cases for the pop() method.

Reference no: EM131151

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