Having trouble fetching image (newbie)
===

I am having trouble fetching an image to show up in my J Frame.
I am sure I put the file in the right place and have typed the name correctly.
this is the code

 

    import java.awt.Color;
    import java.awt.Graphics;
    import java.awt.Graphics2D;
    import java.awt.Image;
    import java.awt.Toolkit;
    import java.io.File;
    import java.net.URL;
    
    import javax.swing.JFrame;
    
    
    public class DrawImage extends JFrame {
    	private Image image;
    	public static void main(String[] args){
    		new DrawImage();
    	}
    	public DrawImage(){
    		super("DrawImage");
    		setSize(600,600);
    		setVisible(true);
    		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    		File appBase = new File("."); //current directory
    		String path = appBase.getAbsolutePath();
    		System.out.println(path);
    		Toolkit tk = Toolkit.getDefaultToolkit();
    		image= tk.getImage(getURL("Castle.jpg"));
    	}
    	private URL getURL(String filename){
    		URL url=null;
    		try{
    			url=this.getClass().getResource(filename);
    			//url=DrawImage.class.getResource(filename);
    			//url=C:\hw/myProg/Graphics2d/Castle.jpg;
    		}
    		catch(Exception e){
    			System.out.print("spleen:");
    		}
    		return url;
    	}
    		public void paint(Graphics g){
    			Graphics2D g2d = (Graphics2D) g;
    			g2d.setColor(Color.BLACK);
    			g2d.fillRect(0, 0, getSize().width, getSize().height);
    			g2d.drawImage(image, 0, 40, this);
    		}
    
    }
What I get is the JFrame with black but no image and this write out to the cousle.

    C:\hw\myProg\Graphics2d\.
    Uncaught error fetching image:
    java.lang.NullPointerException
    	at sun.awt.image.URLImageSource.getConnection(Unknown Source)
    	at sun.awt.image.URLImageSource.getDecoder(Unknown Source)
    	at sun.awt.image.InputStreamImageSource.doFetch(Unknown Source)
    	at sun.awt.image.ImageFetcher.fetchloop(Unknown Source)
    	at sun.awt.image.ImageFetcher.run(Unknown Source)
naturally my image file is in C:\hw\myProg\Graphics2d\Castle.jpg So what am I doing wrong?