Web Reference: Annotations, a form of metadata, provide data about a program that is not part of the program itself. Annotations have no direct effect on the operation of the code they annotate. Sep 27, 2025 · Annotations in Java are a form of metadata that provide additional information about the program. They do not change the action of a compiled program but can be used by the compiler or runtime for processing. Annotations start with ‘@’. Annotations do not change the action of a compiled program. Java Annotations Annotations are special notes you add to your Java code. They start with the @ symbol. They don't change how your program runs, but they give extra information to the compiler or tools.
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