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
.
.
.
.
-----------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() {
@Override
public void windowClosing(WindowEvent e) {
// TODO Auto-generated method stub
System.exit(0);
}
});
frame.setSize(300, 200);
frame.setLocation(400, 250);
frame.setVisible(true);
}
public static void main(String[] args) {
new Test_Mouse2();
}
@Override
public void mouseClicked(MouseEvent e) {
// TODO Auto-generated method stub
System.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！！");
}
}
@Override
public void mousePressed(MouseEvent e) {
// TODO Auto-generated method stub
System.out.println("鼠标按下");
}
@Override
public void mouseReleased(MouseEvent e) {
// TODO Auto-generated method stub
System.out.println("鼠标松开");
}
@Override
public void mouseEntered(MouseEvent e) {
// TODO Auto-generated method stub
tField.setText("鼠标已经进入窗体");
}
@Override
public void mouseExited(MouseEvent e) {
// TODO Auto-generated method stub
tField.setText("鼠标已经移出窗体");
}
@Override
public void mouseDragged(MouseEvent e) {
// TODO Auto-generated method stub
String string = "鼠标拖动到位置：（" + e.getX() + "，" + e.getY() + "）";
tField.setText(string);
}
@Override
public 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 stub
new MouseDemo();
}
@Override
public void mouseEntered(MouseEvent e) {
// TODO Auto-generated method stub
}
@Override
public void mouseExited(MouseEvent e) {
// TODO Auto-generated method stub
}
@Override
public void mousePressed(MouseEvent e) {
// TODO Auto-generated method stub
}
@Override
public 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 stub
if(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....");
}
}
}
以上就是java的鼠标基本事件监听的事件使用。