Byte Code Engineering Library

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Apache Commons BCEL

Developer(s)	Apache Software Foundation
Stable release	6.8.1 / January 11, 2024; 10 months ago (2024-01-11)
Repository	github.com/apache/commons-bcel
Written in	Java
Operating system	Cross-platform
Type	Bytecode Engineering Library
License	Apache License 2.0
Website	commons.apache.org/proper/commons-bcel/

The Byte Code Engineering Library (BCEL) is a project sponsored by the Apache Foundation previously under their Jakarta charter to provide a simple API for decomposing, modifying, and recomposing binary Java classes (I.e. bytecode). The project was conceived and developed by Markus Dahm prior to officially being donated to the Apache Jakarta foundation on 27 October 2001. It is a part of Apache Commons.