paneldemo2.java

java 完全探索的随书源码

// PanelDemo2.java

import java.awt.*;
import java.applet.Applet;

public class PanelDemo2 extends Applet
{
   public void init ()
   {
      Button b = new Button ("Ok");
      add (b);

      add (new Surface ());
   }
}

class Surface extends Canvas
{
   public Dimension getPreferredSize ()
   {
      return new Dimension (50, 50);
   }

   public void paint (Graphics g)
   {
      int width = getSize ().width;
      int height = getSize ().height;

      g.setColor (Color.red);
      g.drawLine (0, 0, width - 1, height - 1);
      g.drawLine (0, height - 1, width - 1, 0);
   }
}