The Java libraries contain several annotation types. For the typical programmer, the most important of these is @Override. This annotation can be used only on method declarations, and it indicates ...

Java Annotation is a tag that represents the metadata i.e. attached with class, interface, methods or fields to indicate some additional information which can be used by java compiler and JVM.

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

Another difference between J2SE 5 and Java SE 6 treatment is the use of the @Override annotation on methods of classes that implement an interface.