Learn to Use the New Annotation Feature of Java 5.0
Developers have always struggled to find ways of adding semantic data to their Java code. They had to: Java didn't have a native metadata facility. But that's all changed with version 5.0 of Java, which allows annotations as a typed part of the language.
by Javid Jamae
February 10, 2005
he new Java 2 Platform Standard Edition 5.0 (the developer version number is 1.5 and the code name is "Tiger") provides many new features, among them is the ability to annotate Java program elements and to create custom annotation types. Development and deployment tools can then read annotated data (also known as metadata) and process it in some fashion.
Previous versions of Java provided a limited and ad-hoc mechanism for annotating code through JavaDoc comments and keyword modifiers. Tools such as XDoclet provide a slightly more sophisticated, yet non-standard annotation syntax, which piggybacks on top of JavaDoc. But now, with Java 1.5, annotations are a typed part of the Java language and allow for both runtime and compile-time processing of annotation data.
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he new Java 2 Platform Standard Edition 5.0 (the developer version number is 1.5 and the code name is "Tiger") provides many new features, among them is the ability to annotate Java program elements and to create custom annotation types. Development and deployment tools can then read annotated data (also known as metadata) and process it in some fashion.
