Local variables in static method and thread safety

Question

I have a question about variable scope.

For example:

class A {
    private static void test() {
        // do something with local variables
    }
}
         


        

Answer 1

For number 1, I don't know what test() does, so I cannot answer. If they modify some static variable of the class A, then it may not be thread safe. If both threads along the way are given reference to the same object, depending on how the object is defined, it might not be thread safe.

For number 2, local variables are in the stack of each thread (or at least conceptually like that), so there is no worry about the local variables being modified by the other threads.