1．编写鼠标事件响应程序MouseEventDemo.java，当鼠标进入和离开窗口时给出相应显示，当按下、弹起时显示当前鼠标的坐标值。

2．编写鼠标事件响应程序MouseMotionEventDemo.java，当鼠标在窗口内移动时显示鼠标的坐标值。

import javax.swing.*;
import java.awt.*;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;

public class MouseEventDemo {
    public static void main(String[] args) {
        // 创建主窗口
        JFrame frame = new JFrame("鼠标事件");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setSize(400, 400);
        frame.setLayout(new BorderLayout());

        // 创建显示区域
        JPanel panel = new JPanel();
        panel.setBackground(Color.GREEN);
        frame.add(panel, BorderLayout.CENTER);

        // 创建状态栏，用于显示鼠标事件信息
        JLabel statusLabel = new JLabel(" ");
        statusLabel.setHorizontalAlignment(SwingConstants.CENTER);
        frame.add(statusLabel, BorderLayout.SOUTH);

        // 添加鼠标监听器
        panel.addMouseListener(new MouseListener() {
            @Override
            public void mouseClicked(MouseEvent e) {
                statusLabel.setText("鼠标左键单击 坐标(" + e.getX() + "," + e.getY() + ")");
            }

            @Override
            public void mousePressed(MouseEvent e) {
                statusLabel.setText("鼠标按下 坐标(" + e.getX() + "," + e.getY() + ")");
            }

            @Override
            public void mouseReleased(MouseEvent e) {
                statusLabel.setText("鼠标弹起 坐标(" + e.getX() + "," + e.getY() + ")");
            }

            @Override
            public void mouseEntered(MouseEvent e) {
                statusLabel.setText("鼠标进入窗口");
            }

            @Override
            public void mouseExited(MouseEvent e) {
                statusLabel.setText("鼠标离开窗口");
            }
        });

        // 设置窗口可见
        frame.setVisible(true);
    }
}


2.
import javax.swing.*;
import java.awt.*;
import java.awt.event.MouseEvent;
import java.awt.event.MouseMotionListener;

public class MouseMotionEventDemo {
    public static void main(String[] args) {
        // 创建主窗口
        JFrame frame = new JFrame("鼠标移动事件");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setSize(400, 400);
        frame.setLayout(new BorderLayout());

        // 创建显示区域
        JPanel panel = new JPanel();
        panel.setBackground(Color.YELLOW);

        // 创建状态栏，用于显示鼠标坐标
        JLabel statusLabel = new JLabel("鼠标移动事件");

        // 添加鼠标移动监听器
        panel.addMouseMotionListener(new MouseMotionListener() {
            @Override
            public void mouseDragged(MouseEvent e) {
                // 不处理拖拽事件
            }

            @Override
            public void mouseMoved(MouseEvent e) {
                // 更新状态栏显示鼠标坐标
                statusLabel.setText("鼠标移动, 坐标(" + e.getX() + "," + e.getY() + ")");
            }
        });

        // 将组件添加到窗口
        frame.add(panel, BorderLayout.CENTER);
        frame.add(statusLabel, BorderLayout.SOUTH);

        // 设置窗口可见
        frame.setVisible(true);
    }
}