PaintComponent not working for drawing shapes

Question

I was studying graphics and tried to use PaintComponent to draw some shapes, following is the code. I am trying for an hour but still its not working really can't get reason. What is the resolution to this simple problem?

public class MyPainting  extends JPanel
{

    public void PaintComponent (Graphics g) 
    {
        super.paintComponent(g);
        g.setColor(Color.RED);
        g.drawRect(100, 100, 10, 20);
    }

    public  static void main (String [] args)
    {
        MyPainting p =  new MyPainting();
        JFrame f= new JFrame();
        f.setSize(300,300);
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.add(p);       
        f.setVisible(true);
    }
}

When I run program there is empty JFrame, I did try it g.drawString, ImageIcon but every time nothing is visible.

Answer 1

The method PaintComponent is not defined in any of the super classes of JPanel. You want paintComponent

@Override
public void paintComponent (Graphics g) 

and add the @Override annotation to allow compiler check for the correct method.