4/24/2023 0 Comments Annotate generatorThe example code in this article was built and run using: Through these features, annotations can be used to augment the compilation process, be available at run-time for affecting program flow or simply serves as a means to document source code and be discarded at compile time.Īn annotation takes the form of where Identifier is the name of the annotation when it was declared. Obviously this could not continue for too long and annotations were born as a means to keep the descriptions / ancillary intent close to the code.Īnnotations can be compiled and made available at run-time, or just compile time or in fact only be available at source level. I say usually because this was not actually standardized and was left to the devices of the developers themselves. Being metadata it is clear that it does not usually have a direct effect on the run-time base itself, but rather seeks to augment / inject information / data about our code.īefore annotations a typical alternative to describe code was to use some medium divorced of the code, usually xml. Introduced in Java 5, annotations have been with us ever since, augmenting our source code with ancillary intent via syntactic metadata. We will cover what they are, their properties, their purpose and different types. The example code will demonstrate the application of an annotation processor using custom annotations on an interface to automatically generate a stub implementation of said interface. In this article we will cover the topic of annotations by way of some theory and a brief example using Java 9.
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