What is the gain from declaring a method as static

Question

I\'ve recently been looking through my warnings in Eclipse and come across this one:

Answer 1

See Samuel's answer on how the scope of the method changes. I guess, this is the main aspect of making a method static.

You also asked about performance:

There might be a tiny performance gain, because a call to a static method does not need the implicit "this" reference as parameter.

However, this performance impact is really tiny. Therefore, it's all about the scope.