It is in JAVA

I need help finishing DiceSet.java... I don't know what to do. Please!

/** ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

* File name : DiceSet.java

* Purpose : Provides a class describing a set of dice

* Author :

* Date :

* Description : This class provides everything needed (pretty much) to describe a set of dice. The

* idea here is to have an implementing class that uses the Die.java class. Includes

* the following:

* public DiceSet( int k, int n ); // Constructor for a set of k dice each with n-sides

* public int sum(); // Returns the present sum of this set of dice

* public void roll(); // Randomly rolls all of the dice in this set

* public void rollIndividual( int i ); // Randomly rolls only the ith die in this set

* public int getIndividual( int i ); // Gets the value of the ith die in this set

* public String toString(); // Returns a stringy representation of this set of dice

* public static String toString( DiceSet ds ); // Classwide version of the preceding instance method

* public boolean isIdentical( DiceSet ds ); // Returns true iff this set is identical to the set ds

* public static void main( String[] args ); // The built-in test program for this class

*

* Notes : Stolen from Dr. Dorin pretty much verbatim, then modified to show some interesting

* things about Java, and to add this header block and some JavaDoc comments.

* Warnings : None

* Exceptions : IllegalArgumentException when the number of sides or pips is out of range

* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

* Revision Histor

* ---------------

* Rev Date Modified by: Reason for change/modification

* ----- ---------- ------------ -----------------------------------------------------------

* @version 1.0.0 2017-02-09 B.J. Johnson Initial writing and release

* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */

public class DiceSetEmpty {

/**

* private instance data

*/

private int count;

private int sides;

private Die[] ds = null;

// public constructor:

/**

* constructor

* @param count int value containing total dice count

* @param sides int value containing the number of pips on each die

* @throws IllegalArgumentException if one or both arguments don't make sense

* @note parameters are checked for validity; invalid values throw "IllegalArgumentException"

*/

public DiceSetEmpty( int count, int sides ) {

ds = new Die[ count ];

}

/**

* @return the sum of all the dice values in the set

*/

public int sum() {

return 0;

}

/**

* Randomly rolls all of the dice in this set

* NOTE: you will need to use one of the "toString()" methods to obtain

* the values of the dice in the set

*/

public void roll() {

}

/**

* Randomly rolls a single die of the dice in this set indexed by 'dieIndex'

* @param dieIndex int of which die to roll

* @return the integer value of the newly rolled die

* @trhows IllegalArgumentException if the index is out of range

*/

public int rollIndividual( int dieIndex ) {

return 0;

}

/**

* Gets the value of the die in this set indexed by 'dieIndex'

* @param dieIndex int of which die to roll

* @trhows IllegalArgumentException if the index is out of range

*/

public int getIndividual( int dieIndex ) {

return -999;

}

/**

* @return Public Instance method that returns a String representation of the DiceSet instance

*/

public String toString() {

String result = "";

return result;

}

/**

* @return Class-wide version of the preceding instance method

*/

public static String toString( DiceSet ds ) {

return "";

}

/**

* @return tru iff this set is identical to the set passed as an argument

*/

public boolean isIdentical( DiceSet ds ) {

return true;

}

/**

* A little test main to check things out

*/

public static void main( String[] args ) {

// You do this part!

}

}