java - 运动中图形对象的鼠标监听器

Question

有什么办法可以让椭圆形在点击后消失。 我无法理解在这种情况下在哪里以及如何使用鼠标监听器，因为 While 循环始终运行，因此 repaint() 也是如此。 提前致谢。

import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.RenderingHints;
import java.awt.Toolkit;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;

@SuppressWarnings("serial")
public class Game extends JPanel {

int x,y;
int offset=400;

int i;                 //j;
private void moveBall() {
    double degrees=(double) i;
    double radians=Math.toRadians(degrees);
    double Sinu=Math.sin(radians);
    double Sinu200=Math.sin(radians)*300;
    int SinuInt=(int) Sinu200;
    y=offset+SinuInt;
    double Cos=Math.cos(radians);
    double Cos200=Math.cos(radians)*300;
    int CosInt=(int) Cos200;
    x=offset+CosInt;

    i++;   // j--;
    if (i==360) i=0;
                }


private int sin(double radians) {
    // TODO Auto-generated method stub
    return 0;
}


    @Override
public void paint(Graphics g) {
    super.paint(g);
    Graphics2D g2d = (Graphics2D) g;
    g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING,RenderingHints.VALUE_ANTIALIAS_ON);
    g2d.setColor(Color.red);
    g2d.fillOval(x, y, 50, 50);


}

    public static void main(String[] args) throws InterruptedException {
    JFrame frame = new JFrame("Rolling album");
    Game game = new Game();
    game.i=90;
    frame.add(game);
    frame.setSize(1100, 1000);
    frame.setVisible(true);
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    while (true) {
        game.moveBall();
        game.repaint();
        Thread.sleep(30);

    }
}


}

Answer 1

1. 创建通告 Ellipse2D .
2. 测试ellipse.contains(x,y)