DRAFT
Observed
ConcreteClassOnlyImplementInterfaceAbstract
Incorrect
A concrete class only needs to implement those abstract methods it inherits from interfaces
Correct
A concrete class needs to implement both the abstract methods it inherits from interfaces and those declared in the abstract class it extends
CorrectionHere is what's right.
Here is what's right.
It needs to implement all abstract methods declared in any supertype (and supertypes of supertypes, recursively).
Language
Java