what do you mean by partial abstraction in java ?

Question

because abtract class has abstract and not abstract methods i.e. method with body, Is it right ???

Answer 1

It's like saying although you dont know what an animal looks like you still know that all animals do somthing similar like make sounds so it's ok to give that method a body because as far as I am aware all animals make sounds and want all my derived classes to know this.

Answer 2

Ramiz exactly and Interfaces can have default methods