Java throwing error “ is not abstract and does not override abstract method in the ”

Question

I am unable to compile the below code written, Java always throws an error. Can you please help me out (P.S: I am new to Java, in a learning stage still). If anywhere, i hav

Answer 1

When you implement an interface you need to implement all the methods of that interface in the implementing class.

In your example you should implement add(), sub(), mul() and div() in any class that implements the interface calci