如何使用Swing在按钮内部打印void方法？

JFrame frame = new JFrame("Swing Button Demo");
frame.setLayout(new FlowLayout());

JButton button = new JButton("Print");
frame.add(button);

button.addActionListener(new ActionListener() {
    public void actionPerformed(ActionEvent e) {
        // 在这里执行你的void方法
        printMessage();
    }
});

public void printMessage() {
    System.out.println("Hello, World!");
}

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

public class SwingButtonDemo {
    public static void main(String[] args) {
        JFrame frame = new JFrame("Swing Button Demo");
        frame.setLayout(new FlowLayout());

        JButton button = new JButton("Print");
        frame.add(button);

        button.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                printMessage();
            }
        });

        frame.setSize(300, 200);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setVisible(true);
    }

    public static void printMessage() {
        System.out.println("Hello, World!");
    }
}