Recaf

Recaf is an open-source Java bytecode editor based on Objectweb’s ASM. ASM is a library that abstracts away the constant pool and class-file attributes. Since keeping track of the constant pool or managing proper stackframes are no longer necessary, complex changes can be made with relative ease. With additional features to assist in the process of editing Recaf is the most feature-rich free bytecode editor available.

Libraries used:

• ASM – Class editing abilities
• CFR – Decompilation
• Simple-Memory-Compiler – Recompilation of decompiled code
• JIMFS – Virtual file system
• ControlsFX – Custom controls (Used in pretty much everything)
• RichTextFX – Decompiler code highlighting
• JRegex – Pattern matching for decompiler code highlighting
• minimal-json – Json reading/writing for config storage
• Commonmark – Markdown parsing
• picocli – Command line argument parsing

Changelog v1.9.0

Java 9+

Recaf’s release binaries will continue to be based on Java 8 for a while, but if you don’t mind a tiny bit of effort you can use any version of Java 9 or above. You can read about this more in the updated documentation page: Usage Guide – Requirements

What’s new

• Add missing opcode format for IINC instructions
• Allow ASM7 in config (And is now the default value)

What’s fixed

• Fix type annotation editor missing UI components
• Fix search from omitting results in declaration mode
• Fix search providing duplicate results in some cases
• Fix command line parsing race condition
• Fix source code not compiling under JDK 9 or higher
  • Remember to read the docs (link above) for details on Java 9+ usage

Download & Use

Copyright (c) 2017-2018 Matthew Coley