[Java] Image-acces denied

java.security.AccessControlException: access denied (java.io.FilePermission TBird.gif read)

java.security.AccessControlException: access denied (java.io.FilePermission TBird.gif read)

...
public void update(Graphics g)
{
	Graphics2D g2 = (Graphics2D) g;
	bird = createImage("TBird.gif");
	g2.drawImage(bird, mod.getX(), mod.getY(), this);
}
 
private	BufferedImage createImage(String file)
{
	Image image1 = Toolkit.getDefaultToolkit().getImage(file);
	try
	{
		MediaTracker tracker = new MediaTracker(this);
		tracker.addImage(image1, 0);
		tracker.waitForID(0);
	}
	catch(Exception	e)
	{
		System.out.println("createimage");
	}
 
	BufferedImage bi = new BufferedImage(70, 70, BufferedImage.TYPE_INT_RGB);
	Graphics2D big = bi.createGraphics();
	big.drawImage(image1,0,0,70,70,null,this);
	return bi;
}
...

...
public void update(Graphics g)
{
	Graphics2D g2 = (Graphics2D) g;
	bird = createImage("TBird.gif");
	g2.drawImage(bird, mod.getX(), mod.getY(), this);
}
 
private	BufferedImage createImage(String file)
{
	Image image1 = Toolkit.getDefaultToolkit().getImage(file);
	try
	{
		MediaTracker tracker = new MediaTracker(this);
		tracker.addImage(image1, 0);
		tracker.waitForID(0);
	}
	catch(Exception	e)
	{
		System.out.println("createimage");
	}
 
	BufferedImage bi = new BufferedImage(70, 70, BufferedImage.TYPE_INT_RGB);
	Graphics2D big = bi.createGraphics();
	big.drawImage(image1,0,0,70,70,null,this);
	return bi;
}
...