JAVA GUI学习 - JTabbedPane选项卡组件学习

 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);
     }

 }