MainClass.java Source code

Introduction

Here is the source code for MainClass.java

Source

import java.awt.Color;
import java.awt.Graphics;

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

public class MainClass extends JPanel {
    Color colors[] = { Color.black, Color.blue, Color.cyan, Color.darkGray, Color.gray, Color.green,
            Color.lightGray, Color.magenta, Color.orange, Color.pink, Color.red, Color.white, Color.yellow };

    public void paint(Graphics g) {
        int deltax = 260 / colors.length;
        for (int i = 0; i < colors.length; i++) {
            g.setColor(colors[i]);
            g.fillRect(i * deltax, 0, (i + 1) * deltax, 260);
        }

    }

    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);
    }
}