What is Java Annotations?

[traveloweb]

What is Java Annotations?

[rohittyagi]

Java annotation is the tag which represent the metadata that indicate some additional information and can be used by java compiler or JVM. This is the form of syntactic metadata which can be added to java source code.It refers to the small comment like construct you can insert before the class, method and filed and declaration.

[wordpar]

an annotation is a form of syntactic metadata that can be added to Java source code..

[suretrack]

Annotations, a form of metadata, provide data about a program that is not part of the program itself.

[sankalppatil]

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.
Annotations in java are used to provide additional information, so it is an alternative option for XML and java marker interfaces.
First, we will learn some built-in annotations then we will move on creating and using custom annotations.

[ab2345]

The Java computer programming language, an annotation is a form of syntactic metadata that can be added to Java source code. Classes, methods, variables, parameters and packages may be annotated.

[dpkmlm]

In the Java computer programming language, an annotation is a form of syntactic metadata that can be added to Java source code. Classes, methods, variables, parameters and packages may be annotated. ... It is possible to create meta-annotations out of the existing ones in Java.

[damponting44]

Java annotations are a method of associating metadata with program elements, enabling the extraction of program behaviours from annotations and the generation of interdependent code.

[aanchalkaura]

Annotation is code about the code, that is metadata about the program itself ie enabling the extraction of program behaviors from annotations and the generation of interdependent code by the Java compiler or VM.

[paul12]

Java annotations are used to provide meta data for your Java code. Being meta data, Java annotations do not directly affect the execution of your code, although some types of annotations can actually be used for that purpose.


Java annotations are typically used for the following purposes:

• Compiler instructions
• Build-time instructions
• Runtime instructions