Boolean matrix - Please Help

Question

Would anyone be able to help me out with code to create a boolean (1/0) for a GUI? Iam looking to use a matrix of up to 10 rows and columbs that would resize depending on an entered value. It would then be possible to use the mouse to click on each element within the matrix to make it a 1 or a 0. I would appretiate any help.

Answer 1

yay !!!!
import java.awt.*;
import java.awt.event.*;
import java.util.BitSet;
import javax.swing.*;
import javax.swing.event.MouseInputAdapter;
* @author  Ian Schneider
public class BooleanMatrix extends JPanel {
    BitSet bits;
    int w = 10;
    int h = 10;
    /** Creates a new instance of BooleanMatrix */
    public BooleanMatrix() {
        resizeMatrix(w,h);
        MouseUpdater updater = new MouseUpdater();
        addMouseListener(updater);
        addMouseMotionListener(updater);
    public boolean isSet(int x,int y) {
        return bits.get(idx(x,y));
    public void toggle(int x,int y) {
        bits.flip(idx(x,y));
    private int idx(int x,int y) {
        return x + y * w;
    public void resizeMatrix(int w,int h) {
        bits = new BitSet(w * h);
        this.w = w;
        this.h = h;
    public Dimension getPreferredSize() {
        return new Dimension(w * 10,h* 10);
    public void paintComponent(Graphics g) {
        super.paintComponent(g);
        for (int i = 0, ii = w; i < ii; i++) {
            for (int j = 0, jj = h; j < jj; j++) {
                if (isSet(i,j))
                    g.setColor(Color.green);
                else
                    g.setColor(Color.red);
                g.fillOval(i * 10 + 2,  j * 10 + 2, 6,6);
    class MouseUpdater extends MouseInputAdapter {
        public void mouseClicked(MouseEvent me) {
            int x = me.getX() / 10;
            int y = me.getY() / 10;
            toggle(x,y);
            repaint();
        public void mouseDragged(MouseEvent me) {
            mouseClicked(me);
    public static final void main(String[] args) throws Exception {
        JFrame f = new JFrame();
        f.setDefaultCloseOperation(f.EXIT_ON_CLOSE);
        f.getContentPane().add(new BooleanMatrix());
        f.pack();
        f.setLocationRelativeTo(null);
        f.show();
}The rest of the exercises are left to the student :)