Java 9 - Enhanced @Deprecated Annotation

@Deprecated annotation was introduced in java 5 version. A program element annotated with @Deprecated means it should not be used for any of the following reasons −

  • Its usage may leads to errors.
  • It may be incompatible in future version.
  • It may be removed in future version.
  • A better and efficient alternative has superseeded it.

Compiler generates warnings whenever a deprecated element is used. With Java 9, two new enhancements are made to @Deprecated annotation.

  • forRemoval − Indicates whether the annotated element is subject to removal in a future version. The default value is false.

  • since − Returns the version in which the annotated element became deprecated. The default value is the empty string.

Deprecated with since

Following example of Boolean class javadoc on Java 9 illustrate the use of since attribute on @Deprecated annotation.

Boolean Class

Boolean Class javadoc

Deprecated with forRemoval

Following example of System class javadoc on Java 9 illustrate the use of forRemoval attribute on @Deprecated annotation.

System Class

System Class javadoc