在JAVA的GUI开发中，Swing组件使用的是默认的皮肤，我们可以通过设置观感器来更改默认的皮肤。

如图所示，这就是JAVA默认观感器（XP系统）现实的效果。这一篇博客将通过示例代码为大家演示如何更改默认的观感器。

import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.swing.JButton;import javax.swing.JCheckBox;import javax.swing.JFrame;import javax.swing.JLabel;import javax.swing.JMenu;import javax.swing.JMenuBar;import javax.swing.JMenuItem;import javax.swing.JPanel;import javax.swing.JPasswordField;import javax.swing.JRadioButton;import javax.swing.JTextArea;import javax.swing.JTextField;import javax.swing.JToggleButton;import javax.swing.SwingUtilities;import javax.swing.UIManager;import javax.swing.UIManager.LookAndFeelInfo;/** * 观感器示例 *  * @author jianggujin * */public class LookAndFeelDemo extends JFrame implements ActionListener{
        public LookAndFeelDemo()   {      super("SwingDemo");      JMenuBar menuBar = new JMenuBar();      JMenu skin = new JMenu("皮肤");      // 获得所有已安装观感器      LookAndFeelInfo[] lookAndFeelInfos = UIManager.getInstalledLookAndFeels();      // 遍历观感器并添加菜单项      for (LookAndFeelInfo lookAndFeelInfo : lookAndFeelInfos)      {         JMenuItem item = new JMenuItem(lookAndFeelInfo.getName());         item.setActionCommand(lookAndFeelInfo.getClassName());         item.addActionListener(this);         skin.add(item);      }      menuBar.add(skin);      setJMenuBar(menuBar);      JPanel root = new JPanel();      root.add(new JButton("我是JButton"));      root.add(new JToggleButton("我是JToggleButton"));      root.add(new JLabel("我是JLabel"));      root.add(new JCheckBox("我是JCheckBox"));      root.add(new JRadioButton("我是JRadioButton"));      root.add(new JTextField("我是JTextField"));      root.add(new JPasswordField("我是JPasswordField"));      root.add(new JTextArea("我是JTextArea"));      add(root);      setSize(400, 300);      setLocationRelativeTo(null);      setDefaultCloseOperation(EXIT_ON_CLOSE);      setVisible(true);   }   public static void main(String[] args)   {      new LookAndFeelDemo();   }   @Override   public void actionPerformed(ActionEvent e)   {      JMenuItem item = (JMenuItem) e.getSource();      try      {         UIManager.setLookAndFeel(item.getActionCommand());         SwingUtilities.updateComponentTreeUI(this);      }      catch (Exception e2)      {         e2.printStackTrace();      }   }}

运行效果：