appletapp.java

Java语言程序设计-源代码（第四部分）和课程相对应的提供了一些用于学习理解的代码设计

// Applet/Application which shows an image of Duke in 
// surfing mode 
   import java.applet.Applet; 
   import java.awt.*; 
   import java.awt.event.*; 
   import java.util.*; 
   
   public class AppletApp extends Applet { 
   
  Date date; 
  
  // An application will require a main() 
  public static void main (String args[]) { 
  
  // Create a Frame to house the applet 
  Frame frame = new Frame("Application"); 
  
  // Create an instance of the class (applet) 
  AppletApp app = new AppletApp(); 
  
  // Add it to the center of the frame 
  frame.add(app, BorderLayout.CENTER); 
  frame.setSize (250, 150); 
 
  // Register the AppletApp class as the 
  // listener for a Window Destroy event 
  frame.addWindowListener (new WindowAdapter() { 
  public void windowClosing (WindowEvent e) { 
  System.exit(0); 
  } 
  } ); 
  
  // Call the applet methods 

   app.init(); 
   app.start(); 
   frame.setVisible(true); // Invokes paint() 
   } 
   
   public void init() { 
   date = new Date(); 
   } 
   
  public void paint (Graphics g) { 
  g.drawString("This program is an Application;", 25, 30);
  g.drawString("This program is also an Applet.", 25, 50); 
  g.drawString(date.toString(), 25, 70); 
  } 
  }