一个例子:
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();
}
}
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();
}
}
在硬盘的某个地方!存放着这样的一个properties文件
它里面写默认的LookAndFeel
和所支持的LookAndFeel有那几种
我是说这个文件在哪里????
UIManager.setLookAndFeel("com.sun.java.swing.plaf.motif.MotifLookAndFell");
swing.defaultlaf=com.sun.java.swing.plaf.motif.MotifLookAndFeel