Top Bytecode Manipulation Libraries for Java

Byte Buddy (without dependencies) · Byte Buddy is a Java library for creating Java classes at run time. This artifact is a build of Byte Buddy with all ASM dependencies repackaged into its own name space.

Javassist · Javassist (JAVA programming ASSISTant) makes Java bytecode manipulation simple. It is a class library for editing bytecodes in Java.

byteman-agent · The Byteman agent jar contains the implementation of the Byteman java agent, including the bytecode transformer, rule parser, type checker and execution engine and the agent listener.

asm · ASM, a very small and fast Java bytecode manipulation framework