坐标1围绕坐标2做圆周运动

CircularMotionWithMouse.java

package com.ayou;

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

public class CircularMotionWithMouse extends JPanel {
    private static final int WIDTH = 800;
    private static final int HEIGHT = 600;
    private static final int RADIUS = 100;

    private int centerX, centerY;
    private double angle = 0;

    public CircularMotionWithMouse() {
        setPreferredSize(new Dimension(WIDTH, HEIGHT));
        addMouseMotionListener(new MouseAdapter() {
            @Override
            public void mouseMoved(MouseEvent e) {
                // 更新坐标2的位置为鼠标指针位置
                centerX = e.getX();
                centerY = e.getY();
                repaint();
            }
        });

        Timer timer = new Timer(20, e -> {
            // 更新角度以模拟圆周运动
            angle += 0.05;

            repaint();
        });
        timer.start();
    }

    @Override
    protected void paintComponent(Graphics g) {
        super.paintComponent(g);

        int pointX = (int) (centerX + RADIUS * Math.cos(angle));
        int pointY = (int) (centerY + RADIUS * Math.sin(angle));

        g.setColor(Color.BLUE);
        g.fillOval(pointX - 5, pointY - 5, 10, 10); // 绘制运动的点
        g.setColor(Color.RED);
        g.fillOval(centerX - 5, centerY - 5, 10, 10); // 绘制坐标2
    }

    public static void main(String[] args) {
        JFrame frame = new JFrame("Circular Motion With Mouse");
        CircularMotionWithMouse circularMotion = new CircularMotionWithMouse();
        frame.add(circularMotion);
        frame.pack();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setLocationRelativeTo(null);
        frame.setVisible(true);
    }
}