Jabel — how I gutted the Java compiler
summary
Overview of how the OpenJDK javac compiler handles new Java language features and why javac refuses to emit newer syntax targeting older bytecode versions. Describes the internals of javac, its plugin mechanism, and how the Jabel tool rewrites or transforms newer syntax (var, switch expressions, text blocks, diamond/abstract-class improvements) so code can use modern Java syntax while remaining bytecode-compatible with Java 8.
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chapters (8)
- 0:00Introduction
- 2:26How compilers work
- 13:57What is Jabel
- 25:56Java syntactic sugar
- 36:26Jabel breaks the compiler
- 49:03Integrating Jabel
- 56:21Records and Jabel
- 1:00:13Q&A
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