example17_21.java

不错的教程 适合中高级人员的使用

import java.awt.*;import java.applet.*;
import java.awt.geom.*;
public class Example17_21 extends Applet
{  public void paint(Graphics g)
   {  Graphics2D g_2d=(Graphics2D)g; 
      Ellipse2D ellipse1=
      new Ellipse2D. Double (20,80,60,60),
      ellipse2=
      new Ellipse2D. Double (40,80,80,80);
      g_2d.setColor(Color.blue);
      Area a1=new Area(ellipse1),
           a2=new Area(ellipse2);
      a1.subtract(a2);             //"差"
      AffineTransform trans=new  AffineTransform(); 
      for(int i=1;i<=10;i++)
         {  trans.rotate(36.0*Math.PI/180,80,75);
            g_2d.setTransform(trans);
            g_2d.fill(a1); 
         }
   }
}