the use of private keyword

Question

I am new to programming. I am learning Java now, there is something I am not really sure, that the use of private. Why programmer set the variable as private then write , ge

Answer 1

It depends on who access these public variables. Most likely, only by people inside your company/team. Then it's trivial to refactor them into getters/setters when necessary. I say in this case, it's better to leave the variables public; unless you are forced to follow the java bean convention.

If you are writing a framework or a library intended for the public, then you shouldn't expose variables. It's impossible for you to change them into getters/setters later.

But the 2nd case is more rare than the first; people apply extremely unreasonable assumptions when it come to software engineer, as if they are not writing code, instead they are carving code in stone. And as if the whole world is watching while you code - in reality, nobody will ever read your code except yourself