如何从JFrame (Netbeans接口)中选择随机JButton？

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;

public class RandomButtonSelection extends JFrame {
    private List<JButton> buttonList;

    public RandomButtonSelection() {
        buttonList = new ArrayList<>();

        // 创建JButton并添加到内容面板
        for (int i = 1; i <= 10; i++) {
            JButton button = new JButton("Button " + i);
            buttonList.add(button);
            getContentPane().add(button);
        }

        // 设置布局管理器为网格布局
        getContentPane().setLayout(new GridLayout(2, 5));

        // 添加按钮点击事件监听器
        ActionListener buttonListener = new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                JButton selectedButton = getRandomButton();
                JOptionPane.showMessageDialog(null, "随机选择的按钮是：" + selectedButton.getText());
            }
        };

        // 给每个按钮添加点击事件监听器
        for (JButton button : buttonList) {
            button.addActionListener(buttonListener);
        }

        // 设置窗口属性
        setTitle("Random Button Selection");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        pack();
        setVisible(true);
    }

    private JButton getRandomButton() {
        Random random = new Random();
        int index = random.nextInt(buttonList.size());
        return buttonList.get(index);
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {
            @Override
            public void run() {
                new RandomButtonSelection();
            }
        });
    }
}