Thread: Need help finding a problem with a few game classes one of them being an applet.

I'm having an annoying issue where one of my classes is causing my applet not to run.

I've narrowed down the issue to the ImageEntity class and I'm stumped as to where the problem is in it and how to make it go away.

The class was originally setup to be used by a JFrame but I've been trying to make it usable to the applet but it doesn't seem to be working.

Here's the code:

[Java] ThreeJavaClassesIssue - Pastebin.com

I've only included the classes that are having the issue but there are a few others I could post the code for if needed.

All three of these classes are from various class projects and the book we are working from never made any mention of an issue like this at the current time and most likely assumed we would know what we were doing by this point. Obviously not.

Here's the fixed code for the Image Class.
It gets an image from file and displays it in an applet that it is being used with.
It works fine but could use some tweaks to be a bit more useful.

 
import java.awt.*;
import java.awt.Graphics2D;
import java.awt.geom.*;
import java.applet.*;
import java.net.*;
 
public class ImageEntity extends BaseGameEntity {
    //variables
    private Image image;
    private Applet applet;
    private AffineTransform at;
    private Graphics2D g2d;
 
    //default constructor
    ImageEntity(Applet a) {
        applet = a;
        setImage(null);
        setAlive(true);
    }
 
    //sets and returns the entity's image object
    public Image getImage() { return image; }
    public void setImage(Image image) { this.image = image; }
 
    //returns the width and height of the entity
    public int width() {
        return getImage().getWidth(applet);
    }
    public int height() {
        return getImage().getHeight(applet);
    }
 
    //returns the center of the entity in pixels
    public double getCenterX() {
        return getX() + width() / 2;
    }
    public double getCenterY() {
        return getY() + height() / 2;
    }
 
    //set reference to the drawing object
    public void setGraphics(Graphics2D g) {
        g2d = g;
    }
 
     private URL getURL(String filename) {
         URL url = null;
         try {
             url = this.getClass().getResource(filename);
         }
         catch (Exception e) { }
         return url;
     }
 
    //load an image file
    public void load(String filename) {
        setImage(applet.getImage(getURL(filename)));
        while(getImage().getWidth(applet) <= 0);
        double x = applet.getSize().width/2  - width()/2;
        double y = applet.getSize().height/2 - height()/2;
        at = AffineTransform.getTranslateInstance(x, y);
    }
 
    //move and rotate the entity
    public void transform() {
        at.setToIdentity();
        at.translate((int)getX() + width()/2, (int)getY() + height()/2);
        at.rotate(Math.toRadians(getFaceAngle()));
        at.translate(-width()/2, -height()/2);
    }
 
    //draw the entity
    public void draw() {
        g2d.drawImage(getImage(), at, applet);
    }
 
    //bounding rectangle
    public Rectangle getBounds() {
        return new Rectangle((int)getX(),(int)getY(),width(),height());
    }
 
}

What I'm confused about is how to use ImageIO to do the same thing and make use of things like RescaleOp at the same time for things like a cloaking system for sprites.

I've seen some codes for this I'm just not sure how to use them.