Use Java's extends keyword to derive a child class from a parent class, invoke parent class constructors and methods, override methods, and more.

End your tour of Java's essential language features with Java 8's method references, interface default and static methods, and three lesser known language updates, then preview new features coming ...

Subramaniam said that Java has few Annotations built in such as deprecate, Override, Suppress Warnings and recommended the usage of Override Annotation while using Java.