package test;

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.Graphics;

import javax.swing.*;

public class Canvas extends JPanel{
	public Canvas(final JFrame win){
		setPreferredSize(new Dimension(1000,600));
		win.setContentPane(this);
		win.revalidate();
	}
	
    public void paintComponent(Graphics g) {
        super.paintComponent(g);

		g.setColor(Color.BLACK);
		g.drawOval(300, 300, 100, 100);
    }
	
	public static void main(String [] args){
		JFrame win = new JFrame();
		win.setLocationRelativeTo(null);
		win.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		win.setVisible(true);
		win.setSize(1200, 700);

		Container canvas = new Canvas(win);

	}
}