Improvement of this method
I assume that Hours is a custom class of yours.  


If you are asking if there is an existing Java class that will automagically calculate the "difference" between two instances of your custom class, the the answer is "No".
If you are asking (more generally) what is the best class for handling temporal quantities so that you can compare them, calculate differences and so on, then the answer is to look at the JodaTime libraries.




I also note that you are STILL using "Business" as a package name.  You should stop it before The Protectors of Java Purity find a way to hack your PC and fill the disc drive with zeros!!!

Seriously, it is bad practice.  Don't do it.  Follow the standard Java naming conventions, like professional developers do.