How to control visibility of variables in Java?

Question

I can imagine 3 type of visibility for variables (but I think there are more):

1. Variable is used within a method and any changes of the value of this variable ar

Answer 1

Important to remember: If you declare a variable in a class and don't use any access modifier it will be package-private. That means from other classes within the same package you can reference it with objectname.variable while from classes in other packages you can't.