What is the difference between implements and extends

Question

When should we use implements and when to use extends in Java?

Answer 1

extends is used by a class for extending any other class. Also used by an interface to implement any other interface.

implements is by a class for implementing an interface

Answer 2

Extends : This is used to get attributes of a parent class into base class and may contain already defined methods that can be overridden in the child class.

Implements : This is used to implement an interface (parent class with functions signatures only but not their definitions) by defining it in the child class.

There is one special condition: "What if I want a new Interface to be the child of an existing interface?". In the above condition, the child interface extends the parent interface.