What is annotation processing in Java?
annotations, java, javac
Solution
"Annotation Processing" is a hook into the compile process of the java compiler, to analyse the source code for user defined annotations and handle then (by producing compiler errors, compiler warning, emitting source code, byte code ...).
API reference: javax.annotation.processing (Java Platform SE 6).
Problem
Quoting, Sun's Official Java Tutorial Class names, 'HelloWorldApp', are only accepted if annotation processing is explicitly requested What does it mean? And how to apply it?