我的按键绑定在JPanel中没有执行其actionPerformed

import javax.swing.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;

public class MyPanel extends JPanel implements ActionListener, KeyListener {
    public MyPanel() {
        // 添加键盘事件监听器
        addKeyListener(this);
        // 请求焦点
        setFocusable(true);
        requestFocus();
    }

    @Override
    public void actionPerformed(ActionEvent e) {
        // 执行按键绑定的操作
        System.out.println("Action performed!");
    }

    @Override
    public void keyPressed(KeyEvent e) {
        // 按下键盘按键时触发
        if (e.getKeyCode() == KeyEvent.VK_ENTER) {
            // 执行操作
            actionPerformed(null);
        }
    }

    @Override
    public void keyReleased(KeyEvent e) {
        // 释放键盘按键时触发
    }

    @Override
    public void keyTyped(KeyEvent e) {
        // 键盘按键被打字机处理时触发
    }

    public static void main(String[] args) {
        JFrame frame = new JFrame("My Panel");
        MyPanel panel = new MyPanel();
        frame.add(panel);
        frame.setSize(300, 200);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setVisible(true);
    }
}