java 鼠标左键点击事件

Java中鼠标左键点击事件可通过MouseListener接口中的mouseClicked方法实现。以下为示例代码：

import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;

public class MyMouseListener implements MouseListener {

    @Override
    public void mouseClicked(MouseEvent e) {
        if (e.getButton() == MouseEvent.BUTTON1) { // 判断左键
            System.out.println("鼠标左键点击事件");
        }
    }

    @Override
    public void mousePressed(MouseEvent e) {}

    @Override
    public void mouseReleased(MouseEvent e) {}

    @Override
    public void mouseEntered(MouseEvent e) {}

    @Override
    public void mouseExited(MouseEvent e) {}

}

可以将该监听器注册到需要监听的组件上，如按钮或面板等：

JButton button = new JButton("Click me");
button.addMouseListener(new MyMouseListener());

当鼠标左键点击注册了该监听器的组件时，会触发mouseClicked方法中的代码，从而实现对应的操作。