Master/Reference Architectures and Patterns/hjp5/examples/ChgNextApplet.java


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/* ChgNextApplet.java */

import java.awt.*;
import java.awt.event.*;
import java.applet.*;
import java.util.*;

public class ChgNextApplet
extends Applet
{
  private String next;

  public void init()
  {
    next = getParameter("next");
    setBackground(Color.red);
    addMouseListener(
      new MouseAdapter()
      {
        public void mouseClicked(MouseEvent event)
        {
          if (next != null) {
            Applet applet = getAppletContext().getApplet(next);
            if (applet != null) {
              int red   = (int)(Math.random() * 256);
              int green = (int)(Math.random() * 256);
              int blue  = (int)(Math.random() * 256);
              applet.setBackground(new Color(red, green, blue));
              applet.repaint();
            }
          }
        }
      }
    );
  }

  public void paint(Graphics g)
  {
    g.drawString("Change " + next, 5, 20);
  }
}