如何在不覆盖JFrame的情况下将JPanel图形添加到JFrame

JFrame frame = new JFrame("My Application");

frame.setLayout(null);

JPanel panel = new JPanel();

panel.setBounds(x, y, width, height);

frame.add(panel);

class MyPanel extends JPanel {
    @Override
    protected void paintComponent(Graphics g) {
        super.paintComponent(g);
        // 在这里绘制图形或添加其他组件
    }
}

import javax.swing.JFrame;
import javax.swing.JPanel;
import java.awt.Graphics;

public class Main {
    public static void main(String[] args) {
        JFrame frame = new JFrame("My Application");
        frame.setLayout(null);

        JPanel panel = new JPanel();
        panel.setBounds(50, 50, 200, 200);

        frame.add(panel);

        frame.setSize(300, 300);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setVisible(true);
    }
}