package com.company;
import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
 
public class SimpleGUI implements ActionListener {
    JButton button;
    public void go() {
        JFrame frame = new JFrame();
        JButton button = new JButton("click me");
        button.addActionListener(this);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.getContentPane().add(button);
        frame.setSize(300, 300);
        frame.setVisible(true);
    }
    public void actionPerformed(ActionEvent event){
        button.setText("I've been clicked");
    }
    }

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