查看“︁通过LookAndFeel设置java程序外观”︁的源代码

<pre class="prettyprint">
    public void setLookandFeel() {
        String look="javax.swing.plaf.metal.MetalLookAndFeel";  //java default

        if(m_isWindows)
            look="com.sun.java.swing.plaf.windows.WindowsLookAndFeel";
        else
            look="com.sun.java.swing.plaf.gtk.GTKLookAndFeel"; 

        try
        {
            UIManager.setLookAndFeel(look);
            SwingUtilities.updateComponentTreeUI(this);
            pack();	
        }
        catch(Exception e)
        {
            System.out.println("Exception:"+e);	
        }        
    }
</pre>

　　1、Metal风格 (默认)

　　String lookAndFeel = "javax.swing.plaf.metal.MetalLookAndFeel";

　　UIManager.setLookAndFeel(lookAndFeel);

　　2、Windows风格

　　String lookAndFeel = "com.sun.java.swing.plaf.windows.WindowsLookAndFeel";

　　UIManager.setLookAndFeel(lookAndFeel);

　　3、Windows Classic风格

　　String lookAndFeel = "com.sun.java.swing.plaf.windows.WindowsClassicLookAndFeel";

　　UIManager.setLookAndFeel(lookAndFeel);

　　4、Motif风格

　　String lookAndFeel = "com.sun.java.swing.plaf.motif.MotifLookAndFeel";

　　UIManager.setLookAndFeel(lookAndFeel);

　　5、Mac风格 (需要在相关的操作系统上方可实现)

　　String lookAndFeel = "com.sun.java.swing.plaf.mac.MacLookAndFeel";

　　UIManager.setLookAndFeel(lookAndFeel);

　　6、GTK风格 (需要在相关的操作系统上方可实现)

　　String lookAndFeel = "com.sun.java.swing.plaf.gtk.GTKLookAndFeel";

　　UIManager.setLookAndFeel(lookAndFeel);

　　7、可跨平台的默认风格

　　String lookAndFeel = UIManager.getCrossPlatformLookAndFeelClassName();

　　UIManager.setLookAndFeel(lookAndFeel);

　　8、当前系统的风格

　　String lookAndFeel = UIManager.getSystemLookAndFeelClassName();

　　UIManager.setLookAndFeel(lookAndFeel);

　　在Java中让用户能够动态地更改应用的外观，可以给用户更好地体验，具体的实现方式是：

　　1，先使用UIManager.setLookAndFeel(String s)方法设定对应的外观

　　2，再使用SwingUtilities.updateComponentTreeUI(Component c)方法立刻更新应用的外观

　　这两个类均在javax.swing包中



参考资料: 

http://java.chinaitlab.com/base/818185.html