JTabbedPane实现关闭按钮

水深无声 2021-07-04 22:42 475阅读 0赞

JTabbedPane如切换卡一般，大大的优化了布局，方便用户操作。Java默认的JTabbedPane添加tab时只会显示一个标题，咱们这里来给它实现关闭按钮，当鼠标移上这个tab时，便显示关闭按钮，移除时，便隐藏。也没什么好说的，实现代码如下：

import java.awt.GridLayout;
    
    import java.awt.event.MouseEvent;
    
    import java.awt.event.MouseListener;
    
    import javax.swing.JLabel;
    
    import javax.swing.JPanel;
    
     
    
    public class addTab implements MouseListener{
    
        JPanel jp;
    
        JLabel lab ;
    
        JLabel lab3=new JLabel();
    
        public addTab(){
    
           lab= new JLabel("选项卡1");
    
           JLabel lab1 = new JLabel("选项卡");
    
            jp=new JPanel();
    
           GridLayout gl= new GridLayout(1,1,10,0);
    
           jp.setLayout(gl);
    
           lab1.setHorizontalAlignment(JLabel.LEFT);//设置文字显示在最左边
    
           lab3.setHorizontalAlignment(JLabel.RIGHT);// 设置文字显示在最右边
    
           jp.add(lab1);
    
           jp.add(lab3);
    
           tab.pane.addTab("i",lab);
    
        tab.pane.setTabComponentAt(tab.pane.indexOfComponent(lab),jp);//实现这个功能的就这一条最重要的语句
    
           lab3.addMouseListener(this);
    
        }
    
        @Override
    
        public void mouseClicked(MouseEvent arg0) {
    
           // TODO Auto-generated method stub
    
           tab.pane.remove(tab.pane.indexOfTabComponent(jp));
    
        }
    
        @Override
    
        public void mouseEntered(MouseEvent e) {
    
           // TODO Auto-generated method stub
    
           lab3.setText("x ");
    
        }
    
        @Override
    
        public void mouseExited(MouseEvent arg0) {
    
           // TODO Auto-generated method stub
    
           lab3.setText("");
    
        }
    
        @Override
    
        public void mousePressed(MouseEvent arg0) {
    
           // TODO Auto-generated method stub
    
        }
    
        @Override
    
        public void mouseReleased(MouseEvent arg0) {
    
           // TODO Auto-generated method stub
    
        }
    
    }

主方法类调用这个类：

import java.awt.event.*;
    
    import javax.swing.*;
    
     
    
    public class tab extends JFrame implements ActionListener{
    
        JMenuItem mi;
    
    staticJTabbedPane pane;
    
    public tab()
    
    {
    
    super("选项卡窗格");
    
    setVisible(true);
    
    setSize(800,600);
    
    setLocationRelativeTo(null);
    
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    
     
    
    mi=new JMenuItem("增加");
    
    JMenu menu=new JMenu("增加");
    
    menu.add(mi);
    
    JMenuBar bar=new JMenuBar();
    
    bar.add(menu);
    
    setJMenuBar(bar);
    
    pane = new JTabbedPane();
    
    add(pane);
    
    new addTab();
    
    mi.addActionListener(this);
    
    }
    
    public static void main(String[] args) throws Exception
    
    {
    
    new tab();
    }
    
    @Override
    
    public void actionPerformed(ActionEvent e) {
    
        // TODO Auto-generated method stub
    
        if(e.getSource()==mi){
    
           new addTab();
    
        }
    
    }
    
    }

** **

**实现效果图：**

![1339132855_1610.PNG][]

**当鼠标移动到第二个选项卡上，便显示出“X”(没有截取到鼠标箭头)：**

![1339132900_8027.jpg][]

**关闭第二个选项卡：**

![1339132949_5322.jpg][]

[1339132855_1610.PNG]: https://img-my.csdn.net/uploads/201206/08/1339132855_1610.PNG
[1339132900_8027.jpg]: https://img-my.csdn.net/uploads/201206/08/1339132900_8027.jpg
[1339132949_5322.jpg]: https://img-my.csdn.net/uploads/201206/08/1339132949_5322.jpg