Developers who are new to Java can sometimes have trouble with class and package naming. In fact, the introductory Java forums are filled with threads starting with questions about these areas of ...

Place the .class folder in a subdirectory of your project with the correct package structure. Refresh the project so that eclipse picks up the new directory.

OpenJDK proposal would replace ASM with an up-to-date and performant API for parsing, generating, and transforming Java class files.