import java.awt.Dimension;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;

import javax.swing.BorderFactory;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTabbedPane;



public class TabPane {
    private JPanel pane1,pane2,pane3;
    private JTabbedPane tabbedPane;
    private int count;
    
    TabPane(){
        JFrame jf=new JFrame();
        jf.setSize(520,500);
        Dimension screen  = jf.getToolkit().getScreenSize();//获取屏幕大小
        jf.setLocation(screen.width/2-jf.getSize().width/2,screen.height/2-jf.getSize().height/2);//设置程序居中显示
        
        tabbedPane = new JTabbedPane(JTabbedPane.TOP);//切换面边标题在上面
        pane1=new JPanel();
        pane2=new JPanel();
        pane3=new JPanel();
        count=3;
                
        tabbedPane.addTab("1",null,pane1,"第1个Tab");//加入面板,实现多面板切换
        tabbedPane.addTab("2",null,pane2,"第2个Tab");
        tabbedPane.addTab("3",null,pane3,"第3个Tab");
        tabbedPane.addTab("+",null,null,"添加新面板");
        
        tabbedPane.addMouseListener(new MouseAdapter() {//选项卡点击事件
            public void mouseClicked(MouseEvent arg0) {
                addtab();//调用addtab方法
            }
        });
        
        tabbedPane.setBorder(BorderFactory.createEmptyBorder(35,0,0,0));//设置tabPane与周边的距离
        jf.add(tabbedPane);
        
        jf.setVisible(true);
    }
    
    public void addtab(){
        if(tabbedPane.getSelectedComponent()==null){
            JPanel newpane=new JPanel();//新的面板
            count++;
            tabbedPane.removeTabAt(tabbedPane.getTabCount()-1);
            tabbedPane.addTab(count+"",null,newpane,"第"+count+"个Tab");
            tabbedPane.addTab("+",null,null,"添加新面板");
        }
    }
    
    public static void main(String[] args){
        new TabPane();
    }
}