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

public class InteractiveHelloWorld extends JFrame {
private JLabel messageLabel;

public InteractiveHelloWorld() {
// Set up the JFrame
setTitle(“Interactive Hello World!”);
setSize(300, 100);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setLocationRelativeTo(null);

// Create a label with the initial message
messageLabel = new JLabel(“Click the button below!”);
messageLabel.setFont(new Font(“Arial”, Font.PLAIN, 18));
messageLabel.setHorizontalAlignment(JLabel.CENTER);
add(messageLabel, BorderLayout.CENTER);

// Create a button to change the message
JButton changeButton = new JButton(“Say Hello”);
changeButton.setFont(new Font(“Arial”, Font.PLAIN, 14));
add(changeButton, BorderLayout.SOUTH);

// Add action listener to the button
changeButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
messageLabel.setText(“Hello, World!”);
}
});
}

public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
new InteractiveHelloWorld().setVisible(true);
}
});
}
}