I want to know when i invoke System.out.print(s.FOO);...The super class variable gets printed...when i invoke s.eat(); the sub class method gets invoked.......why does System.out.print(s.FOO); doesnot print subclass variable ???
Instance methods are polymorphic; they are called according to the runtime type of the object, ie Sub.
Everything else, including static fields, is not polymorphic, and called according to the declared type of the class, ie Base, in both cases. Base b = new Sub(); means its declared type is Base and its runtime type is Sub.