在同一个类中调用的方法

long time searcher but first time I'm posting a question. I am an IT student going into [haven't started yet] my second programming class. The first was just an intro to Java (we're talking basics really). I have been having a hard time with calling methods within the same class. I have attempted search-foo with poor results. A few articles pop up but they don't cover exactly what I'm looking for. Included is an example (quickly and probably poorly written) to get across what I'm asking. The basic gist [remember to stay with me since I'm new to programming in general] is that I want to add two numbers, creating a third, and have the system display the result...long time searcher but first time I'm posting a