Craps

 // Craps.java
// Craps class simulates the dice game craps.
// Adapted from Deitel & Deitel JAVA text

import java.util.Random;

public class Craps
{
    // create random number generator for use in method rollDice
    private Random randomNumbers = new Random();

    // enumeration with constants that represent the game status
    private enum Status { CONTINUE, WON, LOST };

    // constants that represent common rolls of the dice
    private final static int SNAKE_EYES = 2;
    private final static int TREY = 3;
    private final static int SEVEN = 7;
    private final static int YO_LEVEN = 11;
    private final static int BOX_CARS = 12;

    // plays one game of craps
    public int play(int bet)
    {
        //System.out.println("You have a bet of: "+bet);
        int myPoint = 0; // point if no win or loss on first roll
        Status gameStatus; // can contain CONTINUE, WON or LOST

        int sumOfDice = rollDice(); // first roll of the dice

        // determine game status and point based on first roll
        switch ( sumOfDice )
        {
            case SEVEN: // win with 7 on first roll
            case YO_LEVEN: // win with 11 on first roll
            gameStatus = Status.WON;
            break;
            case SNAKE_EYES: // lose with 2 on first roll
            case TREY: // lose with 3 on first roll
            case BOX_CARS: // lose with 12 on first roll
            gameStatus = Status.LOST;
            break;
            default: // did not win or lose, so remember point
            gameStatus = Status.CONTINUE; // game is not over
            myPoint = sumOfDice; // remember the point
            //System.out.printf( "Point is %d\n", myPoint );
            break; // optional at end of switch
        } // end switch

        // while game is not complete
        while ( gameStatus == Status.CONTINUE ) // not WON or LOST
        {
            sumOfDice = rollDice(); // roll dice again

            // determine game status
            if ( sumOfDice == myPoint ) // win by making point
                gameStatus = Status.WON;
            else
            if ( sumOfDice == SEVEN ) // lose by rolling 7 before point
                gameStatus = Status.LOST;
        } // end while

        // display won or lost message
        if ( gameStatus == Status.WON )
        {
            //System.out.println( "Player wins!");
            //System.out.println("Player wins: "+bet);
            //bet=bet*2;
            return bet;
            //System.out.println("New total is: "+bet);
        }
        else
        {
            //System.out.println( "Player loses!");
            //System.out.println( "Player loses: "+bet);
            return -1*bet;
            //System.out.println("New total is: "+bet);
        }
    } // end method play

    // roll dice, calculate sum and display results
    public int rollDice()
    {
        // pick random die values
        int die1 = 1 + randomNumbers.nextInt( 6 ); // first die roll
        int die2 = 1 + randomNumbers.nextInt( 6 ); // second die roll

        int sum = die1 + die2; // sum of die values

        // display results of this roll
        //System.out.printf( "Player rolled %d + %d = %d\n",
          // die1, die2, sum );

        return sum; // return sum of dice
    } // end method rollDice
} // end class Craps