Simple Java Binary Tree Help

I'm stuck on a Java exercise that implements Java Binary Tree's. If you have a good understanding of how Java works this should be very easy for you! I have completed a lot of the program, but can't get it to work. Your job is to complete it to save me from further headache. It involves searching binary trees and pre, post, in order functions. Thanks, tell me how you can help and I'll most likely pick you if you give me a good background and can complete it within the next few hours. I expect to pay around $15 as this really is basic Java.