JAVA观感器

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：