MainClass.java Source code

Introduction

Here is the source code for MainClass.java

Source

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

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

public class MainClass extends JPanel {

    Color color;

    public MainClass(Color color) {
        this.color = color;
    }

    public void paintComponent(Graphics g) {
        int width = getWidth();
        int height = getHeight();
        g.setColor(color);
        g.drawOval(0, 0, width, height);
    }

    public static void main(String args[]) {
        JFrame frame = new JFrame("Oval Sample");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        frame.setLayout(new GridLayout(2, 2));

        Color colors[] = { Color.RED, Color.BLUE, Color.GREEN, Color.YELLOW };
        for (int i = 0; i < 4; i++) {
            MainClass panel = new MainClass(colors[i]);
            frame.add(panel);
        }

        frame.setSize(300, 200);
        frame.setVisible(true);
    }
}