imageapp.java

来自「java 完全探索的随书源码」· Java 代码 · 共 55 行

// ImageApp.java

import java.awt.*;
import java.awt.event.*;

class ImageApp extends Frame
{
   ImageApp (String title)
   {
      super (title);

      addWindowListener (new WindowAdapter ()
                         {
                             public void windowClosing (WindowEvent e)
                             {
                                System.exit (0);
                             }
                         });

      add (new Picture ("sojourner.jpg"));

      pack ();

      setResizable (false);

      setVisible (true);
   }

   public static void main (String [] args)
   {
      new ImageApp ("Image Application");
   }
}

class Picture extends Canvas
{
   private Image image;

   Picture (String imageFileName)
   {
      Toolkit tk = Toolkit.getDefaultToolkit ();
      image = tk.getImage (imageFileName);
   }

   public Dimension getPreferredSize ()
   {
      return new Dimension (256, 248);
   }

   public void paint (Graphics g)
   {
      g.drawImage (image, 0, 0, this);
   }
}