DRAFT
Observed
ConcreteClassOnlyImplementClassAbstract
Incorrect
A concrete class only needs to implement those abstract methods it inherits from abstract superclasses
Correct
A concrete class needs to implement both the abstract methods it inherits from abstract superclasses and those declared in the interfaces it implements
CorrectionHere is what's right.
Here is what's right.
It needs to implement all abstract methods inherited from its supertypes (abstract classes and interfaces).
Language
Java