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

Invoking the Compiler from Code: The Java Compiler API We all use the javac command-line tool for compiling Java source files to class files. Then why do we need an API to compile Java files? Well ...

A preview feature in Java is one that is not yet added permanently even though its design, specification, and implementation are complete. Presently Java has quite a few preview features in the ...

Sealed classes in Java let developers limit the creation and use of subclasses and preserve the class hierarchy. Here is how sealed classes in Java work.