import javax.swing.JFrame;

import javax.swing.JLabel;

import javax.swing.JButton;

import java.awt.BorderLayout;

import java.awt.event.ActionListener;

import java.awt.event.ActionEvent;

public class GreetingGui extends JFrame implements ActionListener {

private JLabel greetingLabel;

public GreetingGui() {

setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);

greetingLabel = new JLabel("Greeting will go here.");

JButton button = new JButton("Greet!");

button.addActionListener(this);

add(greetingLabel, BorderLayout.CENTER);

add(button, BorderLayout.SOUTH);

pack();

}

public void actionPerformed(ActionEvent e) {

Greeter greeter = new Greeter("bob");

String greeting = greeter.greet();

greetingLabel.setText(greeting);

}

public static void main(String[] args) {

GreetingGui gg = new GreetingGui();

gg.setVisible(true);

}

}