如何使用ActionListener增加/接收具有不同输入的多个事件

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

public class MultipleEventExample {
    public static void main(String[] args) {
        JFrame frame = new JFrame("Multiple Event Example");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setSize(300, 200);

        JButton button1 = new JButton("Button 1");
        JButton button2 = new JButton("Button 2");

        // 创建并添加第一个按钮的监听器
        button1.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                JOptionPane.showMessageDialog(frame, "Button 1 clicked!");
            }
        });

        // 创建并添加第二个按钮的监听器
        button2.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                JOptionPane.showMessageDialog(frame, "Button 2 clicked!");
            }
        });

        // 将按钮添加到窗口
        frame.getContentPane().add(button1);
        frame.getContentPane().add(button2);

        // 设置布局并显示窗口
        frame.setLayout(new FlowLayout());
        frame.setVisible(true);
    }
}

button1.addActionListener(new ActionListener() {
    @Override
    public void actionPerformed(ActionEvent e) {
        if (e.getSource() == button1) {
            JOptionPane.showMessageDialog(frame, "Button 1 clicked!");
        }
    }
});

button2.addActionListener(new ActionListener() {
    @Override
    public void actionPerformed(ActionEvent e) {
        if (e.getSource() == button2) {
            JOptionPane.showMessageDialog(frame, "Button 2 clicked!");
        }
    }
});