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POImage comes up as just a grey square when added to JPanel
 

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    <p>I'm working on a project for university which is essentially a re-working of the Space Invaders game with the rules changed a bit. So far I've got a main JFrame, containing a subclass of JPanel (for the background image) which contains another subclass of JPanel which I'm using for the sprites. However, when I run it the JFrame and the background JPanel work fine but then when I draw the sprite it just generates a grey square, for which I can't change the size or position. Here's the code I've got for my Sprite class:</p> <pre><code>import java.awt.*; import java.io.File; import javax.swing.*; public class Sprite extends JPanel { Image spriteImage; int speedX; int speedY; Point pos; final boolean MV_LEFT = false; final boolean MV_RIGHT = true; public Sprite(File _imageFile) { try { spriteImage = javax.imageio.ImageIO.read(_imageFile); } catch (Exception e) { /* handled in paintComponent() */ } speedX = 1; speedY = 1; pos = new Point(100,100); } @Override protected void paintComponent(Graphics g) { super.paintComponent(g); if (spriteImage != null) g.drawImage(this.spriteImage, this.pos.x, this.pos.y, this.getWidth(), this.getHeight(), this); } public void move(boolean direction) { if (direction == true) { this.pos = new Point((pos.x + speedX), pos.y); repaint(); } else { this.pos = new Point((pos.x - speedX), pos.y); repaint(); } } } </code></pre> <p>I'm sure there are a few things wrong in there, but for the paintComponent() method I just parroted all of the image handling tutorials I found around the internet and it still doesn't seem to work. Is there something huge I'm forgetting?</p>
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