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Java鼠标事件监听器MouseListener、MouseMotionListener和MouseWheelListener

ops 2025/8/27 23:27:55

Java鼠标事件监听器MouseListener、MouseMotionListener和MouseWheelListener

java中创建鼠标，键盘的事件行为监听器的几种方法
这里以鼠标点击事件监听器为例，其他也是一样创建。

常用的消息监听器对象
1:点击事件监听器 ActionListener
2:按键事件监听器 keyListener
3:鼠标行为监听器 Mouselistener

事件的几种常见写法：
1：直接提供实现类，用于创建事件监听对象
2：直接使用匿名内部类的对象，代表监听对象
3：自定义窗口，让窗口对象实现事件的接口。

使用示例：用于创建一个按钮的点击事件
JButton btn=new JButton(“Click Me”);

方法1：创建一个接口类。
class mousclick implements ActionListener{
public void actionPerformed(ActionEvent e) {
JOptionPane.showMessageDialog(forma.this, e.getActionCommand());//弹出信息框
}
btn.addActionListener(new mousclick()); //绑定这个接口类

方法2：使用内部类对象
btn.addActionListener( new ActionListener() {
public void actionPerformed(ActionEvent e) {
JOptionPane.showMessageDialog(forma.this, e.getActionCommand());//弹出信息框
}
});

方法3：就是单独在一个类里面创建窗口，用方法1和方法2的方式创建事件监听绑定

另外还可以用Lmabda表达式来写。
例如：
btn3.addActionListener( e ->JOptionPane.showMessageDialog(forma.this, e.getActionCommand()) );//弹出信息框

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-----------下方是鼠标监听器的创建使用方法--------------

鼠标监听器MouseListener
监听鼠标事件MouseEvent。

相应事件和处理方法
鼠标事件处理方法
MOUSE_CLICKED MouseClicked (MouseEvent) 鼠标点击（单或双）
MOUSE_PRESSED MousePressed (MouseEvent) 鼠标按下
MOUSE_RELEASED MouseReleased(MouseEvent) 鼠标松开
MOUSE_ENTERED MouseEntered (MouseEvent) 鼠标进入（某组件区域）
MOUSE_EXITED MouseExited (MouseEvent) 鼠标离开（某组件区域）
鼠标事件MouseEvent常用方法
int getClickCount() 得到点击次数1 OR 2；
int getX(), int getY() 得到鼠标的（象素）位置。

鼠标监听器MouseMotionListener
对于鼠标的移动和拖放，另外用鼠标运动监听器MouseMotionListener。
因为许多程序不需要监听鼠标运动，把两者分开可简化程序。
相应事件和处理方法
鼠标事件处理方法
MOUSE_MOVED MouseMoved (MouseEvent) 鼠标在移动
MOUSE_DRAGGED MouseDragged(MouseEvent) 鼠标被拖动

范例程序

我们把对这两个鼠标监听器综合运用。


```haskell```bash
/******************************************************************************** @project: SchoolPaint_3* @package: com.burns.school.paint.test* @file: T.java* @author: zhangpei* @created: 2018-4-25* @purpose:* * @version: 1.0* * Revision History at the end of file.* * Copyright 2018 AcconSys All rights reserved.******************************************************************************/package com.burns.school.paint.test;import java.awt.Color;
import java.awt.Frame;
import java.awt.Label;
import java.awt.TextField;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseMotionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;public class Test_Mouse2 implements MouseMotionListener, MouseListener {Frame frame = new Frame("关于鼠标的多重监听器");TextField tField = new TextField(30);public Test_Mouse2() {Label label = new Label("请按下鼠标左键并拖动");frame.add(label, "North");frame.add(tField, "South");frame.setBackground(new Color(180, 255, 255));frame.addMouseListener(this);frame.addMouseMotionListener(this);frame.addWindowListener(new WindowAdapter() {@Overridepublic void windowClosing(WindowEvent e) {// TODO Auto-generated method stubSystem.exit(0);}});frame.setSize(300, 200);frame.setLocation(400, 250);frame.setVisible(true);}public static void main(String[] args) {new Test_Mouse2();}@Overridepublic void mouseClicked(MouseEvent e) {// TODO Auto-generated method stubSystem.out.print("鼠标点击----" + "\t");if (e.getClickCount() == 1) {System.out.println("单击！");} else if (e.getClickCount() == 2) {System.out.println("双击！");} else if (e.getClickCount() == 3) {System.out.println("三连击！！");}}@Overridepublic void mousePressed(MouseEvent e) {// TODO Auto-generated method stubSystem.out.println("鼠标按下");}@Overridepublic void mouseReleased(MouseEvent e) {// TODO Auto-generated method stubSystem.out.println("鼠标松开");}@Overridepublic void mouseEntered(MouseEvent e) {// TODO Auto-generated method stubtField.setText("鼠标已经进入窗体");}@Overridepublic void mouseExited(MouseEvent e) {// TODO Auto-generated method stubtField.setText("鼠标已经移出窗体");}@Overridepublic void mouseDragged(MouseEvent e) {// TODO Auto-generated method stubString string = "鼠标拖动到位置：（" + e.getX() + "，" + e.getY() + "）";tField.setText(string);}@Overridepublic void mouseMoved(MouseEvent e) {// TODO Auto-generated method stub}}
*****************/

MouseWheelListener说明

mousewheelmoved
void mousewheelmoved(mousewheelevent e)
鼠标滚轮旋转时调用。

java抓取鼠标事件和滚轮事件代码如下

package demo;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseWheelEvent;
import java.awt.event.MouseWheelListener;import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;public class MouseDemo extends JFrame  implements MouseListener,MouseWheelListener{static int chang=400,kuang=400;public MouseDemo(){JPanel j=new JPanel();JButton jb=new JButton("click");j.add(jb);this.add(j);this.setVisible(true);this.setSize(chang,kuang);jb.addMouseListener(this);this.addMouseWheelListener(this);}public   void mouseClicked(MouseEvent e){//左击事件if(e.getButton()==MouseEvent.BUTTON1)System.out.println("zuo ji shi jian ....");//滑轮按下事件if(e.getButton()==MouseEvent.BUTTON2)System.out.println("zhong  ji shi jian ....");//右击事件if(e.getButton()==MouseEvent.BUTTON3)System.out.println("you ji shi jian ....");}public static void main(String[] args) {// TODO Auto-generated method stubnew MouseDemo();}@Overridepublic void mouseEntered(MouseEvent e) {// TODO Auto-generated method stub}@Overridepublic void mouseExited(MouseEvent e) {// TODO Auto-generated method stub}@Overridepublic void mousePressed(MouseEvent e) {// TODO Auto-generated method stub}@Overridepublic void mouseReleased(MouseEvent e) {// TODO Auto-generated method stub}@Override//利用滚轮事件将窗口放大和缩小public void mouseWheelMoved(MouseWheelEvent e) {// TODO Auto-generated method stubif(e.getWheelRotation()==1){chang+=10;kuang+=10;this.setSize(chang,kuang);this.validate();System.out.println("滑轮向前。。。。");}if(e.getWheelRotation()==-1){chang-=10;kuang-=10;this.setSize(chang,kuang);this.validate();System.out.println("滑轮向后....");}}
}