Unsigned Web start Image Loader

Performance Tuning
#1

I have this code for loading images from within a web start Jar. I’m wondering how good it is and what I can do to make it better.

The last function loadImg is really what I have problems with. I first load the image as an ImageIcon to not raise a security exception. Secondly I draw that Image into a BufferedImage because I can’t cast it directly, as it’s giving me a ToolkitImage instead of an Image.
Updated with information gained from another thread on JGO.

Usage is :
BufferedImage img = ImageLoader.loadImage(“data/images/”, “test.png”);
or
BufferedImage img = ImageLoader.loadImage(“test.png”);


import java.awt.Image;
import java.awt.image.BufferedImage;
import java.util.HashMap;
import javax.swing.ImageIcon;


public class ImageLoader {
	static final HashMap<String, BufferedImage> imgStore = new HashMap<String, BufferedImage>();
	static final ClassLoader classLoader = ImageLoader.class.getClassLoader();

	static public BufferedImage loadImage(String fileName){
		return loadImage("", fileName);
	}
	
	static public BufferedImage loadImage(String folderName, String fileName){
		BufferedImage retImg = imgStore.get(fileName);
		if(retImg == null){
			retImg = loadImg(folderName+fileName);
			imgStore.put(fileName, retImg);
		}
		return retImg;
	}

	static private BufferedImage loadImg(String filename) {
		try{
			return ImageIO.read(ImageLoader.class.getResourceAsStream(filename));
		}catch(Exception e){
			System.out.println("Error loading: "+filename);
			e.printStackTrace();
		}
		return null;
	}


}