starapplet.java

Java Classic Examples是我买的两本书：《JAVA经典实例》和《java入门经典源代码》里边附送光盘里带的源码

import javax.swing.*;
import java.awt.*;
import java.awt.geom.*;

public class StarApplet extends JApplet
{
  // Initialize the applet
  public void init()
  {
    Container content = getContentPane();

    // Add the panel to the content pane for the applet
    content.add(pane);                 // BorderLayout.CENTER is default position
  }

  // Class defining a pane on which to draw
  class StarPane extends JComponent
  {
    public void paint(Graphics g)
    {
      Graphics2D g2D = (Graphics2D)g;
      Star star = new Star(0,0);                 // Create a star
      float delta = 60f;                         // Increment between stars
      float starty = 0f;                         // Starting y position

      // Draw 3 rows of 4 stars
      for(int yCount = 0; yCount < 3; yCount++)
      {
        starty += delta;                        // Increment row position
        float startx = 0f;                      // Start x position in a row

        // Draw a row of 4 stars
        for(int xCount = 0; xCount<4; xCount++)
          g2D.draw(star.atLocation(startx += delta, starty));
      }
    }
  }

  StarPane pane = new StarPane();              // Pane containing stars
}