Java awt repaint()在移动时留下痕迹

import java.awt.*;
import javax.swing.*;

public class DoubleBufferedExample extends JFrame {
    public DoubleBufferedExample() {
        setTitle("Double Buffered Example");
        setSize(300, 200);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        
        JPanel panel = new JPanel();
        panel.setDoubleBuffered(true); // 启用双缓冲
        add(panel);
    }
    
    public static void main(String[] args) {
        EventQueue.invokeLater(() -> {
            DoubleBufferedExample example = new DoubleBufferedExample();
            example.setVisible(true);
        });
    }
}

class CustomComponent extends Component {
    @Override
    public void paint(Graphics g) {
        super.paint(g); // 这会清除背景
        // 绘制你的组件内容
    }
}

import javax.swing.*;
import java.awt.*;

class CustomPanel extends JPanel {
    @Override
    protected void paintComponent(Graphics g) {
        super.paintComponent(g); // 清除背景
        // 绘制你的组件内容
    }
}