MainClass.java Source code

Introduction

Here is the source code for MainClass.java

Source

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;

public class MainClass extends JPanel {

    public MainClass() {

        JButton btn1 = new JButton("Button1");
        btn1.addActionListener(new ButtonListener());
        add(btn1);

    }

    public static void main(String[] args) {
        JFrame frame = new JFrame();
        frame.getContentPane().add(new MainClass());

        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setSize(200, 200);
        frame.setVisible(true);
    }
}

class ButtonListener implements ActionListener {
    ButtonListener() {
    }

    public void actionPerformed(ActionEvent e) {
        if (e.getActionCommand().equals("Button1")) {
            System.out.println("Button1 has been clicked");
        }
    }
}