Java Annotations

Annotations provide information about your program, or the elements of that program(classes, methods, fields, variables, and so forth), in a structured way that is amenable to automated processing by external tools.

An annotation is considered a modifier(like public or static) and should appear before other midifiers on a line.

It is indicated by an @ character followed by the name of an annotation type. Example to define an annotation type.

@interface Reviewed { // an annotation type is a special kind of interface
  String reviewer();
  int date();
}

For package annotations, you can create a file called package-info.java within the package directory, and put in the file nothing but a package statement with any annotations for the package(plus any useful comments, of course).