检测鼠标悬停在非JComponent对象上

import java.awt.*;
import java.awt.event.*;

public class MouseHoverDetection {
    public static void main(String[] args) {
        JFrame frame = new JFrame("Mouse Hover Detection");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setSize(400, 400);
        
        Container contentPane = frame.getContentPane();
        contentPane.setLayout(null);
        
        // 创建一个自定义的非JComponent对象
        MyCustomObject customObject = new MyCustomObject();
        customObject.setBounds(100, 100, 100, 100);
        contentPane.add(customObject);
        
        // 添加鼠标监听器到容器上
        contentPane.addMouseListener(new MouseAdapter() {
            @Override
            public void mouseMoved(MouseEvent e) {
                // 获取鼠标的坐标位置
                Point mousePoint = e.getPoint();
                
                // 判断鼠标是否在非JComponent对象上
                if (customObject.contains(mousePoint)) {
                    // 鼠标悬停在非JComponent对象上的操作
                    System.out.println("Mouse is hovering over the custom object.");
                } else {
                    // 鼠标不在非JComponent对象上的操作
                    System.out.println("Mouse is not hovering over the custom object.");
                }
            }
        });
        
        frame.setVisible(true);
    }
}

class MyCustomObject {
    // 自定义非JComponent对象的绘制方法
    public void paint(Graphics g) {
        g.setColor(Color.RED);
        g.fillRect(0, 0, getWidth(), getHeight());
    }
}