Java 鼠标点击事件实例

首先我们应该知道鼠标点击事件怎么实现

其部分代码如下

if (anyEvent.getButton() == MouseEvent.BUTTON1) {}

e.getButton()返回值分别为NOBUTTON、BUTTON1、BUTTON2、BUTTON3,分别代表着无点击、左击、中间键、右击三种情况

<span style="font-family:Verdana;">事件源</span>.addMouseListener(new MouseAdapter() {//建立事件处理机制
@Override
public void mouseClicked(MouseEvent e) {
if(e.getButton()==e.BUTTON1){//点击鼠标左键
int x=e.getX();
int y=e.getY();
String str="您点击的是左键，鼠标当前点击位置的坐标是(" + x + "," + y+")";
label.setText(str);
}else if(e.getButton()==e.BUTTON2){//点击鼠标滑轮
int x=e.getX();
int y=e.getY();
String str="您点击的是滑轮，鼠标当前点击位置的坐标是(" + x + "," + y+")";
label.setText(str);
}
else if(e.getButton()==e.BUTTON3){//点击鼠标右键
int x=e.getX();
int y=e.getY();
String str="您点击的是右键，鼠标当前点击位置的坐标是(" + x + "," + y+")";
label.setText(str);
}
}
});

具体实例，原题是《Java基础入门》

package BookProblem;
import java.awt.BorderLayout;
import java.awt.EventQueue;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.border.EmptyBorder;
import javax.swing.JLabel;
import java.awt.Color;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
public class P381Problem6A extends JFrame {
private JPanel contentPane;
/**
* Launch the application.
*/
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
P381Problem6A frame = new P381Problem6A();
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
/**
* Create the frame.
*/
public P381Problem6A() {
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 450, 300);
contentPane = new JPanel();

contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
setContentPane(contentPane);
contentPane.setLayout(null);
JLabel label = new JLabel("此处显示鼠标右键点击的坐标");
label.setBounds(5, 5, 424, 31);
label.setOpaque(true);//设置控件不透明
label.setBackground(Color.GREEN); //<span style="font-family:Verdana;">设置标间颜色</span>
contentPane.add(label);
contentPane.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent e) {
if(e.getButton()==e.BUTTON1){
int x=e.getX();
int y=e.getY();
String str="您点击的是左键，鼠标当前点击位置的坐标是(" + x + "," + y+")";
label.setText(str);
}else if(e.getButton()==e.BUTTON2){
int x=e.getX();
int y=e.getY();
String str="您点击的是滑轮，鼠标当前点击位置的坐标是(" + x + "," + y+")";
label.setText(str);
}
else if(e.getButton()==e.BUTTON3){
int x=e.getX();
int y=e.getY();
String str="您点击的是右键，鼠标当前点击位置的坐标是(" + x + "," + y+")";
label.setText(str);
}
}
});
}
}

效果图