sketcher.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

// Sketching application
import java.awt.*;
import java.awt.event.*;

public class Sketcher implements WindowListener
{
  public static void main(String[] args)
  {
    theApp = new Sketcher();              // Create the application object
    theApp.init();                        // ...and initialize it
  }

  // Initialization of the application
  public void init()
  {
    window = new SketchFrame("Sketcher");        // Create the app window
    Toolkit theKit = window.getToolkit();        // Get the window toolkit
    Dimension wndSize = theKit.getScreenSize();  // Get screen size

    // Set the position to screen center & size to 2/3 screen size
    window.setBounds(wndSize.width/6, wndSize.height/6,        // Position
                     2*wndSize.width/3, 2*wndSize.height/3);   // Size 

    window.addWindowListener(this);              // theApp as window listener
    window.setVisible(true);                     // Display the window
  }

  // Handler for window closing event
  public void windowClosing(WindowEvent e)
  {
    window.dispose();                           // Release the window resources
    System.exit(0);                             // End the application
  }

  // Listener interface functions we must implement - but don't need
  public void windowOpened(WindowEvent e) {}
  public void windowClosed(WindowEvent e) {}
  public void windowIconified(WindowEvent e) {}
  public void windowDeiconified(WindowEvent e) {}
  public void windowActivated(WindowEvent e) {}
  public void windowDeactivated(WindowEvent e) {}

  private static SketchFrame window;              // The application window
  private static Sketcher theApp;                 // The application object
}