UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel");

1、Metal风格 (默认) String lookAndFeel = "javax.swing.plaf.metal.MetalLookAndFeel"; UIManager.setLookAndFee(lookAndFeel);
2、Windows风格 String lookAndFeel = "com.sun.java.swing.plaf.windows.WindowsLookAndFeel"; UIManager.setLookAndFee
(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);