Jakarta-bcel

Jul 20, 2023

Library for generating Java bytecode

The Byte Code Engineering Library formerly known as JavaClass is intended to give users a convenient possibility to analyze, create, and manipulate binary Java class files those ending with .class. Classes are represented by objects which contain all the symbolic information of the given class methods, fields and byte code instructions, in particular.

Such objects can be read from an existing file, be transformed by a program e.g. a class loader at run-time and dumped to a file again. An even more interesting application is the creation of classes from scratch at run-time. The Byte Code Engineering Library BCEL may be also useful if you want to learn about the Java Virtual Machine JVM and the format of Java .class files.

BCEL is already being used successfully in several projects such as compilers, optimizers, obsfuscators and analysis tools, the most popular probably being the Xalan XSLT processor at Apache.

WWW http//jakarta.apache.org/bcel/



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