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Everything about Java annotation

Syntactic metadata for Java source code

In the Java computer programming language, an annotation is a form of syntactic metadata that can be added to Java source code, like an attribute. Classes, methods, variables, parameters and Java 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 Java class files generated by the Java compiler. This allows annotations to be retained by the Java virtual machine at run-time and read via reflection. It is possible to create meta-annotations out of the existing ones in Java. Wikipedia →

🧭 Start here: a 6-step reading path

  1. Read the overview: Java annotationA 5-minute orientation
  2. Pick up a classic book: Core Java 2.The most-reprinted book on the subject
  3. Read the landmark paper: Jannovar: A Java Library for Exome AnnotationCited 72 times
  4. Go sideways: Java syntaxA closely related topic
  5. Go sideways: Jakarta EEA closely related topic

📖 Definitions

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🗂️ The subject at a glance

  1. History
  2. Built-in annotations
  3. Example
  4. Processing

🏆 Landmark papers (most cited)

📚 Books worth reading

Ranked by number of editions on Open Library, a rough measure of how lasting a book is.

🔗 Related topics