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A small Java utility used with AspectJ which allows any checked exception to be re-thrown as an unchecked RuntimeException. This allows aspects to generically throw any checked exception without the compiler complaining. BCEL is used to accomplish this.
A suite of Java ClassLoaders that use "load-time reflection" (the modification of bytecodes upon class loading) to extend existing Java classes. It uses the excellent BCEL library (http://bcel.sf.net).
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 . Classes are
represented by updatable objects.