Java GUI >> Basic Shapes with Graphics

gistfile1.java

import java.awt.Color;
import java.awt.Graphics;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class MyGUI extends JPanel{
        
	public void paintComponent(Graphics g) 
	{
		//super.paintComponent(g);
		g.setColor(Color.RED);
		g.drawRect(100, 50, 30, 20);
		g.setColor(Color.GREEN);
		g.drawOval(100, 100, 50, 50);
		
	}
	
	
	public static void main(String [] args) {
		
		MyGUI mygui = new MyGUI(); //Because this class extends JPanel, mygui is a panel object
		
		JFrame jf = new JFrame();
		
		jf.setSize(300,300);
		jf.setTitle("Basic Shapes");
		jf.setVisible(true);
		jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		jf.add(mygui);
	
	}	
}