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It's not as easy as you think, trying to understand someone else's creation. I hope that you continue to progress in your programming abilities and start helping others on this and other sites and...

I'm still not clear on what the three classes are supposed to be doing. If you don't get a decent answer soon, consider clarifying the rolls, states and behaviors of the three classes you mention.
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OK, please clarify just what you're trying to do. Also what is EmpChoice supposed to be doing? Why is its method static? And if it needs to be static, why create an EmpChoice instance? Why are you...

You're trying to call a method where methods can't be called, out naked in the class. Methods should be called inside of constructors, other methods, or initializer blocks. The only exception is when...