Re: Graphics help please

import java.awt.*;
import java.awt.event.*;
import java.util.*;
import javax.swing.*;

public class test2 extends JPanel implements Runnable {
     private volatile int angle;

     public test2() {
         setPreferredSize(new Dimension(300,300));
     }

     public void run() {
         while (--angle >= -360) {
             repaint();
             try {
                 Thread.sleep(20);
             } catch (InterruptedException ie) {
                 ie.printStackTrace();
             }
         }
     }

     public void paintComponent(Graphics g2D) {
         Graphics2D g = (Graphics2D)g2D;
         g.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
          RenderingHints.VALUE_ANTIALIAS_ON);
         g.setColor(Color.WHITE);
         g.fillRect(0,0,getWidth(),getHeight());
         g.setColor(Color.BLUE);
         g.drawArc(0,0,getWidth()-1,getHeight()-1,90,angle);
     }

     public static void main(String[] args) {
         EventQueue.invokeLater(new Runnable() {
             public void run() {
                 JFrame f = new JFrame();
                 f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                 test2 t2 = new test2();
                 f.add(t2);
                 f.pack();
                 f.setVisible(true);
                 new Thread(t2).start();
             }
         });
     }
}