Chess960V3.java

/*
Chess960V3.java     MrG     2012.0227
purpose:    randomly find all 960 Fischer Chess Board combinations
required files: Chess960V3.java             main class
        EasyWriter.java             file I/O class
translator: javac Chess960V3.java
interpreter:    java Chess960V3
*/

//imported classes
import java.util.Random;
import java.util.ArrayList;

//main class
public class Chess960V3
{
    public static final int BOARD_SIZE = 8;
    public static final int EVE = 0;
    public static final int ODD = 1;
    public static void main(String[] args)
    {
        int printCount = 1;

        ArrayList<String[]> foo = new ArrayList<String[]>();

        initList(foo);
        System.out.println(printCount + "\t" +toString(foo.get(0)));

        while(printCount<960)
        {
            String[] whitePieces = new String[BOARD_SIZE];
            setBishop(whitePieces,EVE);
            setBishop(whitePieces,ODD);
            setRandom(whitePieces,"Q");
            setRandom(whitePieces,"N");
            setRandom(whitePieces,"N");
            setFirstOpen(whitePieces,"R");
            setFirstOpen(whitePieces,"K");
            setFirstOpen(whitePieces,"R");
            if(!foundB(whitePieces,foo))
            {
                System.out.println(printCount + "\t" +toString(whitePieces));
                foo.add(whitePieces);
                printCount++;
            }
        }
        fileList(foo);
    }

    public static void fileList(ArrayList<String[]> bar)
    {
        EasyWriter ross = new EasyWriter("960.txt");
        for(int j = 0; j<bar.size(); j++)
        {
            ross.println(j + "\t" + toString(bar.get(j)));
        }
        ross.close();
    }

    public static void initList(ArrayList<String[]> bar)
    {
        String[] bob = {"R","N","B","Q","K","B","N","R"};
        bar.add(bob);
    }

    public static boolean foundB(String[] wP, ArrayList<String[]> bar)
    {
        for(String[] board : bar)
        {
            if(sameB(board,wP))
            {
                return true;
            }
        }
        return false;
    }

    public static boolean sameB(String[] b1, String[] b2)
    {
        for(int i=0; i<b1.length; i++)
        {
            if(!b1[i].equals(b2[i]))
            {
                return false;
            }
        }
        return true;
    }

    public static void setFirstOpen(String[] wP, String piece)
    {
        int pos = 0;
        while(wP[pos]!=null)
        {
            pos++;
        }
        wP[pos]=piece;
    }

    public static void setRandom(String[] wP, String piece)
    {
        int pos;
        Random die = new Random();
        do
        {
            pos=die.nextInt(BOARD_SIZE);
        }
        while(wP[pos]!=null);
        wP[pos]=piece;
    }

    public static void setBishop(String[] wP, int offset)
    {
        Random die = new Random();
        wP[offset+die.nextInt(4)*2]="B";
    }

    public static String toString(String[] wP)
    {
        String temp = "";
        for(int k=0; k<wP.length; k++)
        {
            temp += wP[k];
        }
        return temp;
    }
}