Question

distinguish between non static static.​

Answer 1

Answer:

A static method belongs to the class itself while a non-static method belongs to each instance of a class. ... Therefore, a static method can be called directly without creating any instance of the class and an object is needed to call a non-static method.

Answer 2

Few differences between static and non-static methods:

• A static method belongs to the class itself while a non-static method belongs to each instance of a class. Therefore, a static method can be called directly without creating any instance of the class and an object is needed to call a non-static method.
• We cannot access non-static member variables (aka instance member variables) from a static method without creating an instance of its class. Static methods can only access static variables while non-static methods can access both static and non-static variables.
• Similar to non-static member variables, we cannot access any non-static method from a static method without creating an instance of its class.
• A static method use early binding (or compile time binding) whereas a non-static method require runtime binding. This is the reason why we can call a static method without creating any instance.
• We cannot override a static method in Java while we can override a non-static method. This is because overriding require runtime binding (Polymorphism) and static methods are bonded by compiler.
• We cannot use this and super keywords inside a static method since they are associated to a particular instance.
• Static methods reduces the memory footprint of the application. This is because the memory is allocated only once for static method during the time of class loading while for a non-static method, memory is allocated every time the method is called.

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