Random Terrain Generation

[RahulPatel2323]

So I'm trying to randomly generate terrain for my final assignment in my first year of Java and to make things simpler I put my Generation Code in a method but I keep getting the error, " The variable (insert variable name) amy be accessed her before definitely assigned a value", the problem is if I enter a value the terrain generated is flat, any suggestions?

Thanks in advance,
Rahul

[Zren]

Which line is causing the error?