Simplest Java Drawing Skeleton

import java.awt.*;  
class Window extends Frame{  

	Window(){  

		setSize(800,900);//frame size 300 width and 300 height  

		setLayout(null);//no layout manager  

		setVisible(true);//now frame will be visible, by default not visible  

	}  
	

	@Override
	public void paint(Graphics g) {
		// TODO Auto-generated method stub
		super.paint(g);
		
		//draw an orange line
		g.setColor(Color.ORANGE);
		g.drawLine(10,200,400,200);
		
		//draw a circle 
		g.fillOval(100, 100, 200, 200);
		
		
		//change color to red
		g.setColor(Color.RED);
		
		//draw filled rectangle
		g.fillRect(10, 300, 400, 40);
		
		//change color to green and draw another rectangle
		g.setColor(Color.GREEN);
		g.fillRect(100, 300, 200, 100);
		
		
		//draw another rectangle
		g.drawRect(100, 450, 300, 30);
		
		//create points to form a hexagon
		//draw the hexago
		int[] xPoints = {210,  240,   280, 310,  280, 240, 210};
		int[] yPoints = {600, 550, 550, 600, 650, 650, 600};
		g.drawPolygon(xPoints, yPoints, 7);
		
	}

	public static void main(String args[]){  
		Window w=new Window();  

	}
}