How do you use annotation processors with a simple code example?

Annotation processors are tools that allow you to process annotations in Java code at compile time. They can be used to generate additional Java source files, XML files, or other resources based on the annotations present in your code. Here's a simple example to illustrate how to use annotation processors.

Example of an Annotation Processor

import javax.annotation.processing.*; import javax.lang.model.SourceVersion; import javax.lang.model.element.Element; import javax.lang.model.element.TypeElement; import javax.lang.model.util.Elements; import java.util.Set; @SupportedAnnotationTypes("MyAnnotation") @SupportedSourceVersion(SourceVersion.RELEASE_8) public class MyAnnotationProcessor extends AbstractProcessor { @Override public boolean process(Set extends TypeElement> annotations, RoundEnvironment roundEnv) { for (Element element : roundEnv.getElementsAnnotatedWith(MyAnnotation.class)) { System.out.println("Processing: " + element); } return true; } }

Annotation Processor Java Compile Time Code Generation

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