MainClass.java Source code

Introduction

Here is the source code for MainClass.java

Source

/*
 * Output:
 *  
 */

import java.awt.Graphics;

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

public class MainClass extends JPanel {

    public void paint(Graphics g) {
        g.fillRect(0, 0, 200, 200);

    }

    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);
    }
}