example17_20.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_20 extends Applet
{  public void paint(Graphics g)
   {  Graphics2D g_2d=(Graphics2D)g;
      Ellipse2D ellipse1=
      new Ellipse2D. Double (20,50,120,120);
      Ellipse2D ellipse2=
      new Ellipse2D. Double (80,50,120,120);
      Area a1=new Area(ellipse1); Area a2=new Area(ellipse2);
      a1.intersect(a2);             //"与"
      g_2d.fill(a1);
      ellipse1.setFrame(150,50,120,120); ellipse2.setFrame(260,50,50,100);
      a1=new Area(ellipse1); a2=new Area(ellipse2);
      a1.add(a2);             //"或"
      g_2d.fill(a1);
      ellipse1.setFrame(20,170,120,120);ellipse2.setFrame(80,170,160,160);
      a1=new Area(ellipse1);  a2=new Area(ellipse2);
      a1.subtract(a2);             //"差"
      g_2d.fill(a1);
      ellipse1.setFrame(150,170,120,120); ellipse2.setFrame(260,170,50,100);
      a1=new Area(ellipse1);  a2=new Area(ellipse2);
      a1.exclusiveOr(a2);         //"异或"
      g_2d.fill(a1);
   }
}