JEP 457, Class-File API (Preview), has been Integrated into JDK 22, proposing a new API for parsing, generating, and transforming Java class files. This API will initially replace ASM within the JDK w ...

The classfile API proposal notes that class file generation, parsing, and instrumentation are ubiquitous in the Java ecosystem, with many tools and libraries needing to process class files.

Processing streams and insight into classes Java 24 finalizes two important features, with Stream Gatherers and the Class-File API. Both have had two previews each in Java 22 and Java 23.