Types Of Variables

1) Local variables

2) Instance variables (non-static)

3) Static variables

1) Local variables:-

        Variables declared within a method or a block are known as local variables whose scope and lifetime are available within corresponding function or block only.

2) Instance variables:-

        Variables declared within a class are known as instance variables.

        They are initialized at runtime when an object is created.

        They're initialized separate copies for every objects.

        They can be accessed through objects.

eg:-

        objname.variablename;

3) Static variables(class variables)

        Variables declared within a class as static are known as static variables.

        They are initialized only one copy for class at compilation time.

        They can be shared by all the objects of that class.

        They can be accessed through class name.

eg:-

        classname.variablename;