Swing在ActionListener中更改JLabel的文本

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

JFrame frame = new JFrame("Swing示例");
JLabel label = new JLabel("初始文本");

JButton button = new JButton("点击我");
button.addActionListener(new ActionListener() {
    public void actionPerformed(ActionEvent e) {
        label.setText("新的文本");
    }
});

frame.getContentPane().add(label);
frame.getContentPane().add(button);

frame.setLayout(new FlowLayout());
frame.setSize(300, 200);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);