java求鼠标单击事件代码

![img](https://img-mid.csdnimg.cn/release/static/image/mid/ask/916309975046159.png "#left"

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
/*我们继承WindowAdapter抽象类并实现MouseListener interface,
*因此我们必须把MouseListener中的5个方法都实现，如果不想实现
*可用匿名内部类的方法编写处理程序。
*/
public class MouseDemo1 extends WindowAdapter implements MouseListener{
    JFrame f=null;
    JButton b1=null;
    JLabel label=null;
   
    public MouseDemo1(){
       f=new JFrame("MouseDemo1");
       Container contentPane=f.getContentPane();
       contentPane.setLayout(new GridLayout(2,1));
       b1=new JButton("按钮");
       label=new JLabel("起始状态，还没有鼠标事件",JLabel.CENTER);
       b1.addMouseListener(this);
       contentPane.add(label);
       contentPane.add(b1);
       f.pack();
       f.show();
       f.addWindowListener(this);
    }
    public void mousePressed(MouseEvent e){
        label.setText("你已经压下鼠标按钮");
    }
    public void mouseReleased(MouseEvent e){
        label.setText("你已经放开鼠标按钮");
    }
    public void mouseEntered(MouseEvent e){
        label.setText("鼠标光标进入按钮");
    }
    public void mouseExited(MouseEvent e){
        label.setText("鼠标光标离开按钮");
    }
    public void mouseClicked(MouseEvent e){
        label.setText("你已经按下按钮");
    }
    public void windowClosing(WindowEvent e){
        System.exit(0);
    }
    public static void main(String[] args){
       new MouseDemo1();       
    }
}