Java Swing - 如何创建后更改JLabel文本

import javax.swing.JLabel;
import javax.swing.JOptionPane;

public class Main {
  public static void main(String[] args) {
    
    JLabel label = new JLabel("w3cschool.cn", JLabel.LEFT);
    label.setText("Centered");
    
    JOptionPane.showMessageDialog(null, label);
    
  }
}