Question

Example:

ThisClass.staticMethod(Object... parameters);

will be accessed by multiple instances of other objects and simultaneously.

Will there be any dependencies with this other objects when they are using the same static method at the same time?

Answer 1

Only if the method uses static Objects or the arguments are shared by the other instances.

Example: Math.max(int a, int b) is a static method but does not use any static objects, so there are no dependencies.

Example 2: Here all invocations share the same result variable, two parallel calls to staticMethod can cause wrong results.

private static int result = 0;
private static int staticMethod(Object... args)
{
      result = args.length;
      //Do Something
      return result;
}

Example 3: This one is Thread safe if none of the arguments are shared, each invocation has its own instance of result.

private static int staticMethod(Object... args)
{
    int result = 0;
    result = args.length;
    //Do something
    return result;
}

Example 4: This uses the class as a lock to prevent parallel access to the class functions. Only one call to staticMethod executes all others wait

private static int result = 0;
private static synchronized int staticMethod(Object... args)
{
      result = args.length;
      //Do Something
      return result;
}