Buttons having shape of Sector

Question

I want to draw three Buttons of Sector shape and arrange them in form of a circle.
Sector angle must be 120 degree for all the three Buttons.Please help!

Answer 1

...hm, okay, i put something together... keep in mind it's pretty late... and maybe i should have let that last bottle of wine be, but anyway, perhaps this will help:
public class TestFrame extends JFrame {
    private JPanel _cPane;
    private Ellipse2D _oval=new Ellipse2D.Double(40,40,100,100);
    int[] xs={90,90,133,140,140};
    int[] ys={40,90,115,115,40};
    private Area _sector1=new Area(new Polygon(new int[]{90,90,133,140,140}, new int[]{40,90,115,115,40}, 5));
    private Area _sector2=new Area(new Polygon(new int[]{90,90,47,40,40}, new int[]{40,90,115,115,40}, 5));
    private Area _sector3=new Area(new Polygon(new int[]{40,47,90,133,140}, new int[]{140,115,90,115,140}, 5));
    private int _inside=0;
    public static void main(String[] args) {
        new TestFrame();
    public TestFrame() {
        super();
        init();
        initFrame();
    private void init() {
        Area rhs = new Area(_oval);
        _sector1.intersect(rhs);
        _sector2.intersect(rhs);
        _sector3.intersect(rhs);
        _cPane=new JPanel(){
            public void paint(Graphics g) {
                super.paint(g);
                Graphics2D g2=(Graphics2D)g;
                g2.setColor(Color.RED);
                g2.fill(_oval);
                g2.setColor(Color.BLUE);
                g2.draw(_sector1);
                g2.draw(_sector2);
                g2.draw(_sector3);
                g2.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER,0.5f));
                g2.setColor(Color.yellow);
                if (_inside==1)
                    g2.fill(_sector1);
                else if (_inside==2)
                    g2.fill(_sector2);
                else if (_inside==3)
                    g2.fill(_sector3);
        _cPane.addMouseMotionListener(new MouseMotionAdapter(){
            public void mouseMoved(MouseEvent e) {
                Point point = e.getPoint();
                if (_sector1.contains(point))
                    _inside=1;
                else if (_sector2.contains(point))
                    _inside=2;
                else if (_sector3.contains(point))
                    _inside=3;
                else _inside=0;
                repaint();
    private void initFrame() {
        setSize(200, 200);
        Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
        setLocation((screenSize.width - getWidth()) / 2, (screenSize.height - getHeight()) / 2);
        setContentPane(_cPane);
        setVisible(true);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}It's not as bad as it seem, although i hardcoded the coordinates (you should not, but as i said, it's pretty late already). The example above will highlight a sector as soon as you move your mouse above it - i guess you won't have trouble handling a click accordingly, i just thought this would be a bit more visible.