What are the restrictions for static method?

Whenever you say something is static that means data or method is not associated with an object instance of that class.They are allocated when a class is loaded,during compile time. Only a single copy of that will be created for that class. So even if you have never created an object of a class you an always access static data and method of that class. If you have class by name 'Vehicle' and you have a static method 'drive()' then it can simply be invoked by ' Vehicle.drive()', no need of object cretaion in this scenario.A static method cannot access non static data and can invoke other static methods.All static methods are automatically final. It is redundant to make them final.