Java Overall Editor is a complex editor and viewer for compiled java binaries.
BSEditor: dirtyJOE - Java Overall Editor is a complex editor and Viewer for compiled java binaries (.class files). Current version still have some limitations, but hopefully those will be removed within the next releases.

dirtyJOE is free for non-commercial use.

dirtyJOE is entirely written in C++, no third party libraries were used.

Main features:
Viewer for: constant pool, methods, fields, attributes
Editor for: constant pool, bytecode, file header

v1.2 (c213):

* Added context menu for Interfaces field (Implements listbox on Overview tab). You can now Add, Edit and Delete specific interface.
* Added context menu for Attributes listbox on Overview tab. You can now Edit, View, Add and Delete specific attribute. Currently supported attributes: InnerClasses, Synthetic, Deprecated, ConstantValue, Signature, SourceFile, EnclosingMethod
* Added Edit with dirtyJOE feature to shell context menu of .class files
* Added simple Check for Updates mechanism
* Name of opened file is visible on window title
* Native x64 executable as a separate download you can free download dirtyJOE 1.2(c213) now.