Implementing a method of interface is overriding or not in java
interface, java, multiple-inheritance, overriding, polymorphism
Solution
The term "overriding" applies when there is an existing implementation of the method . The correct term is "implementing" for interfaces and other abstract declarations.
The `@Override` tag is used for both cases - it is used when:
The method does override or implement a method declared in a supertype. --javadocs
And from Wikipedia:
Method overriding, in object oriented programming, is a language feature that allows a subclass or child class to provide a specific implementation of a method that is already provided by one of its superclasses or parent classes.
Note that interfaces can have default methods - redefining these methods overrides them:
When you extend an interface that contains a default method, you can ... redefine the default method, which overrides it.
Besides linking to "canonical" sources, I'm not sure what advice to offer on winning a semantic argument with your friend. Perhaps you could ask him what the distinction is between "implementing" and "overriding", and what word he would use instead of "overriding" for the concept of redefining an existing method.
Problem
I know this might be crazy but today one of my friend puzzled by asking when we implement an interface in java is it considered as method overriding. I told him it is not overriding as we are providing working(definition) of method first time when we implement any interface. To support multiple inheritance java provide interface but he was not convinced and was arguing. Please bring some light on to the topic.