Java Programming

I have a class called Target with a parameter called double currentAzimuth that is returned by .getCurrentAzimuth(). In another class, I have an ArrayList full of these Target objects. I am needing to sort the List by each objects currentAzimuth.

This is what I am trying in my Target class:

	static class AzimuthComparator implements Comparator
	{
		public double compare(Object o1, Object o2)
		{
			Target t1 = (Target)o1;
			Target t2 = (Target)o2;
			return t1.getCurrentAzimuth() - t2.getCurrentAzimuth();
		}
	}

And this in my other class:

	Collections.sort(targetArrayList, new AzimuthComparator());

Eclipse is giving me this error: The return type is incompatible with Comparator.compare(Object, Object)

I looked up the Comparator in the API (http://java.sun.com/j2se/1.5.0/docs/api/java/util/Comparator.html#compare%28T,%20T%29) and sure enough, it only returns an int.

Am I going about attempting this correctly, and if not, what should I be trying to do. Thanks.