public class JTabbedPaneKnow extends JFrame

 {

     JTabbedPane jTabbedPane;

     JPanel jPanelRed;

     JPanel jPanelGreen;

     JPanel jPanelYellow;

     JPanel jPanelBlue;

     public JTabbedPaneKnow()

     {

         init();

         this.setBounds(200, 50, 500, 500);

         this.setTitle("选项卡 - 知识");

         this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

         this.add(jTabbedPane);

     }

     public void init()

     {

         jPanelBlue = new JPanel();jPanelBlue.setBackground(Color.blue);jPanelBlue.setName("蓝色卡牌");

         jPanelGreen = new JPanel();jPanelGreen.setBackground(Color.green);jPanelGreen.setName("绿色卡牌");

         jPanelRed = new JPanel();jPanelRed.setBackground(Color.red);jPanelRed.setName("红色卡牌");

         jPanelYellow = new JPanel();jPanelYellow.setBackground(Color.yellow);jPanelYellow.setName("黄色卡牌");

         //第一个参数：选项卡的标题所在位置：上下左右

         //第二个参数：即选项卡呈现的方式：当窗口变小时：卡标题向下排列，或不重排列出现滚动条

         jTabbedPane = new JTabbedPane(JTabbedPane.TOP,JTabbedPane.SCROLL_TAB_LAYOUT);

         //第一个参数：即选项卡显示的标题

         //第二个参数：即选项卡没张卡对应的面板

         jTabbedPane.add("蓝色卡牌", jPanelBlue);jTabbedPane.add("绿色卡牌", jPanelGreen);

         jTabbedPane.add("红色卡牌", jPanelRed);jTabbedPane.add("黄色卡牌", jPanelYellow);

         //设置默认的选项卡页，方式一：通过选项卡的索引

         jTabbedPane.setSelectedIndex(1);

         //设置默认的选项卡页，方式二：通过选项卡变量名

         jTabbedPane.setSelectedComponent(jPanelGreen);

         //获取当前卡页的选项卡索引

         int index = jTabbedPane.getSelectedIndex();

         //获取当前卡页的选项卡面板

         JPanel jPanel = (JPanel) jTabbedPane.getSelectedComponent();

         System.out.println(jPanel.getName());

         //为选项卡添加监听器

         jTabbedPane.addChangeListener(new JTabbedPaneChangeListener());

     }

     private class JTabbedPaneChangeListener implements ChangeListener

     {

         @Override

         public void stateChanged(ChangeEvent e)

         {

             JTabbedPane jTabbedPane = (JTabbedPane) e.getSource();

             JOptionPane.showMessageDialog(null, ((JPanel)jTabbedPane.getSelectedComponent()).getName()+"：被打开了");

         }

     }

     public static void main(String[] args)

     {

         JTabbedPaneKnow jTabbedPaneKnow = new JTabbedPaneKnow();

         jTabbedPaneKnow.setVisible(true);

     }

 }