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);
}

}