这里面包含了一百多个JAVA源文件

				// Get the currently installed look and feel
				    LookAndFeel lf = UIManager.getLookAndFeel();
				    
				    // Install a different look and feel; specifically, the Windows look and feel
				    try {
				        UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel");
				    } catch (InstantiationException e) {
				    } catch (ClassNotFoundException e) {
				    } catch (UnsupportedLookAndFeelException e) {
				    } catch (IllegalAccessException e) {
				    }