jclasslib bytecode viewer

jclasslib bytecode viewer is a tool that visualizes all aspects of compiled Java class files and the contained bytecode. In addition, it contains a library that enables developers to read, modify and write Java class files and bytecode.

jclasslib for Java is released under the GPL.

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jclasslib 3.0 Release News

This release brings full compatibility with Java 1.5 (list of changes in the class file format)
  • Displays new access flags in Java 1.5:
    • ACC_ENUM
  • Displays new attributes in Java 1.5:
    • RuntimeVisibleAnnotations
    • RuntimeInvisibleAnnotations
    • RuntimeVisibleParameterAnnotations
    • RuntimeInvisibleParameterAnnotations
    • EnclosingMethod
    • Signature
    • LocalVariableTypeTable
  • Various bug fixes in the GUI