JBE is a bytecode editor suitable for viewing and modifying java class files. It is built on top of the open-source jclasslib bytecode viewer by ej-technologies. For verification and exporting the class files, JBE uses the the Bytecode Engineering Library by Apache's Jakarta project. JBE requires Java 1.5 to run. It uses the standard mnemonics for JVM opcodes as instruction names. Jumps are absolu