static

[aryan sanghvi]

can a static modifier be used for local variables.
Inner class: If a class is defined in a method , it can access only
final variables declared in a method, can it still access all the
variables in the base class.
Can an interface be instantiated.

[Anthony Villanueva]

can a static modifier be used for local variables.

In C++ yes. In Java no. A local variable in Java has no "memory".

Inner class: If a class is defined in a method , it can access only final variables declared in a method, can it still access all the variables in the base class.

Base class? You mean enclosing class, right? It depends on the context of the method. If it is a static method, only static veriables can be accessed, else it can access both static and non-static.

Can an interface be instantiated.

No, but an object reference can be of an interface type.

[Valentin Crettaz]

aryan,
Welcome to Javaranch
We'd like you to read the Javaranch Naming Policy and change your publicly displayed name to comply with our unique rule. Thank you.