plaftest.java

来自「Java2核心技术卷一 配套源码,看了还不错」· Java 代码 · 共 69 行

/**
 * @version 1.20 25 Oct 1998
 * @author Cay Horstmann
 */

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

class PlafPanel extends JPanel 
   implements ActionListener
{  public PlafPanel()
   {  metalButton = new JButton("Metal");
      motifButton = new JButton("Motif");
      windowsButton = new JButton("Windows");

      add(metalButton);
      add(motifButton);
      add(windowsButton);

      metalButton.addActionListener(this); 
      motifButton.addActionListener(this); 
      windowsButton.addActionListener(this); 
   }

   public void actionPerformed(ActionEvent evt)
   {  Object source = evt.getSource();
      String plaf = "";
      if (source == metalButton)
         plaf = "javax.swing.plaf.metal.MetalLookAndFeel";
      else if (source == motifButton)
         plaf = "com.sun.java.swing.plaf.motif.MotifLookAndFeel";
      else if (source == windowsButton)
         plaf = "com.sun.java.swing.plaf.windows.WindowsLookAndFeel";
      try
      {  UIManager.setLookAndFeel(plaf);
         SwingUtilities.updateComponentTreeUI(this);
      }
      catch(Exception e) {}
   }

   private JButton metalButton;
   private JButton motifButton;
   private JButton windowsButton; 
}


class PlafFrame extends JFrame
{  public PlafFrame()
   {  setTitle("PlafTest");
      setSize(300, 200);
      addWindowListener(new WindowAdapter()
         {  public void windowClosing(WindowEvent e)
            {  System.exit(0);
            }
         } );

      Container contentPane = getContentPane();
      contentPane.add(new PlafPanel());
   }
}

public class PlafTest
{  public static void main(String[] args)
   {  JFrame frame = new PlafFrame();
      frame.show();  
   }
}