Can we mark an overriding method as abstract

[Simran Dass]

Can we mark an overriding method as abstract ?

  class A{

      public void play(){ System.out.print(" in A");}
  }

  abstract class B extends A{

      public abstract void play();
  }

Cannot understand how the code in class B works. Why would we want to do this

[Henry Wong]

Simran Dass wrote:
Cannot understand how the code in class B works. Why would we want to do this

Basically, you want to create a new class that IS-A a particular sub class, but you don't have the complete implementation. Or you have multiple possible implementations, of which the subclass implementation is not one of them.

Granted, it is not a common case, but it can happen.

Henry

[Simran Dass]

Yeah. Thanks for the quick reply.

[Prithvi Sehgal]

In what cases, such a scenario can happen? I find this quiet meaningless. Umm that too marking an instance method as abstract.
Doesn't it violate the rules of overriding?

Best Regards,

[Lucas Smith]

This code if fine, but useless and I think that it violates the LSP principle a little, but it depends on the interpretation.