Color filling problem in fillarc() method of Graphics class

Question

I draw a circle in a panel. The circle space is divided to more than one sectors.The sectors are filled to particular color using fillarc(int x, int y, int start_angle, int end_angle) method of java.awt.Graphics class.
When i fill the color, i faced a problem. That is i have seen the panel background Color in some pixels of thet arc spaces.
How will i fill the particular color in full arc spaces? How will i solve this problem?
Thanks for your advance reply.
Regards
Murali.R

Answer 1

import java.awt.*;
import java.awt.geom.*;
import javax.swing.*;
public class ArcFill extends JPanel {
    protected void paintComponent(Graphics g) {
        super.paintComponent(g);
        Graphics2D g2 = (Graphics2D)g;
        g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
                            RenderingHints.VALUE_ANTIALIAS_ON);
        int w = getWidth();
        int h = getHeight();
        double radius = Math.min(w,h)*7/16.0;
        double x = (w - 2*radius)/2;
        double y = (h - 2*radius)/2;
        Ellipse2D.Double circle = new Ellipse2D.Double(x,y,2*radius,2*radius);
        // Fill east sector with Arc2D.
        Rectangle r = circle.getBounds();
        double start = -45.0;
        double extent = 90.0;
        int type = Arc2D.PIE;
        Arc2D.Double arc = new Arc2D.Double(r, start, extent, type);
        g2.setPaint(Color.red);
        g2.fill(arc);
        // Fill south sector.
        arc.setAngleStart(-135.0);
        g2.setPaint(Color.green.darker());
        g2.fill(arc);
        arc.setAngleStart(-225);
        g2.setPaint(Color.blue);
        g2.fill(arc);
        arc.setAngleStart(-315);
        g2.setPaint(Color.orange);
        g2.fill(arc);
        // Draw circle and lines.
        g2.setPaint(Color.black);
        g2.draw(circle);
        double theta = -Math.PI/4;
        double cx = circle.getCenterX();
        double cy = circle.getCenterY();
        for(int j = 0; j < 4; j++) {
            x = cx + radius*Math.cos(theta);
            y = cy + radius*Math.sin(theta);
            g2.draw(new Line2D.Double(cx, cy, x, y));
            theta += Math.PI/2;
    public static void main(String[] args) {
        ArcFill panel = new ArcFill();
        panel.setPreferredSize(new Dimension(400,400));
        JOptionPane.showMessageDialog(null, panel, "", -1);
}