Graphics not working

[Aabhay Singh]

I have 2 classes

package g.TestCopter;

public class MainMain 
{

	public static void main(String[] args) 
	{
		OurFrame frame=new OurFrame();
		frame.setVisible(true);
		frame.setDefaultCloseOperation(frame.EXIT_ON_CLOSE);

	}
	

}

package g.TestCopter;

import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;

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

public class OurFrame extends JFrame 
{

	public OurFrame()
	{
		super("New Game");
		setSize(900,600);
		JPanel panel=new JPanel();

	}
		
	@Override
	public void paint(Graphics g) 
	{
	Graphics2D g2d=(Graphics2D) g;
	g2d.setColor(Color.GREEN);
	g2d.fillOval(0,0,30,30);
	}
	

}

The oval is not painting. Im missing something very basic, cant figure out what .

[Stephan van Hulst]

You are not using the event dispatch thread. Do it like so:

public static void main(String[] args) {  
  SwingUtilities.invokeLater(new Runnable() {
    public void run() {
      OurFrame frame = new OurFrame();
      frame.setVisible(true);
      frame.setDefaultCloseOperation(frame.EXIT_ON_CLOSE);
    }
  });
}

[Phil Freihofner]

I don't see where you've added the JPanel to the JFrame!

Are you even getting a proper frame size to display? Is it blank? I think when drawing directly on a JFrame, as you are doing, one has to draw on a specific layer--a display layer of some sort which I can't recall off the top of my head. I'm more used to adding a JPanel to a JFrame, and putting the graphics on the JPanel rather than the JFrame.