鼠标事件

import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
public class c11_6 extends JApplet ...{
    JLabel lb1=new JLabel("X");
    JLabel lb2=new JLabel("Y");
    JLabel lb3=new JLabel("");
    JTextField tf1=new JTextField(5);
    JTextField tf2=new JTextField(5);
    Container cp= getContentPane();
    int x,y;
    FlowLayout flow=new FlowLayout(FlowLayout.CENTER,5,5);
    public void init()
    ...{
        cp.setLayout(flow);
        cp.add(lb1);
        cp.add(tf1);
        cp.add(lb2);
        cp.add(tf2);
        cp.add(lb3);
        addMouseListener(new mouseListener());
        addMouseMotionListener(new koLis());
    }
      class mouseListener implements MouseListener...{
        public void mouseClicked(MouseEvent e)...{
    //    lb3.setText("点击鼠标");
            
        }
        public void mousePressed(MouseEvent e)...{
            lb3.setText("按下鼠标");
            
        }
        public void mouseEntered(MouseEvent e)...{
            lb3.setText("鼠标进入");
        }
        public void mouseExited(MouseEvent e)...{
            lb3.setText("鼠标退出");
        }
        public void mouseReleased(MouseEvent e)...{
            lb3.setText("鼠标松开");
        }
    }
     class  koLis implements MouseMotionListener...{
         public void mouseMoved(MouseEvent e)...{
             x=e.getX();
             y=e.getY();
             tf1.setText(String.valueOf(x));
             tf2.setText(String.valueOf(y));
         }
         public void mouseDragged(MouseEvent e)...{
             lb3.setText("拖动鼠标");
             
         }
     }
}

        

       当用户用鼠标进行交互操作时，会产生鼠标事件MouseEvent。处理MouseEvent事件的监听者对象是可以实现MouseListener接口和MouseMotionListener接口的类，或者继承MouseAdapter的子类。

与Mouse有关的事件可分为：1、MouseListener接口，共提供5种方法，主要针对鼠标的按键与位置作检测；

                                              2、MouseMotionListener接口，提供两种方法，主要针对鼠标的坐标与拖动操作作处理