Java annotation: Difference between revisions

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In the [[Java (programming language)|Java computer programming language]], an '''annotation''' is a form of syntactic [[metadata]] that can be added to [[Java (programming language)|Java]] source code.<ref>{{cite web|url = http://download.oracle.com/javase/1,5.0/docs/guide/language/annotations.html|title = Annotations|accessdate = 2011-09-30|publisher = [[Sun Microsystems]]}}.</ref> Classes, methods, variables, parameters and packages may be annotated. Like [[Javadoc]] tags, Java annotations can be read from source files. Unlike [[Javadoc]] tags, Java annotations can also be embedded in and read from [[class (file format)|class files]] generated by the compiler. This allows annotations to be retained by Java VM at [[Run time (program lifecycle phase)|run-time]] and read via [[reflection (computer science)|reflection]].<ref>{{Cite book|title = Java(TM) Language Specification|edition = 3rd|publisher = [[Prentice Hall]]|year = 2005|isbn = 0-321-24678-0|url = http://java.sun.com/docs/books/jls/third_edition/html/j3TOC.html|author = [[Sun Microsystems]]|postscript = <!--None-->}}.</ref> It is possible to create meta-annotations out of the existing ones in Java.<ref>{{cite web

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