dirtyJOE

dirtyJOE has been created as an alternative for editing and viewing compiled Java binaries, meaning CLASS files.
It aims to carry out more complex tasks and the list of features recommends it for viewing the constant pool of the aforementioned file as well as methods, fields and various attributes; editing functionality refers to constant pool items, bytecode, header and various attributes.

Intuitive layout, clean interface

The main application window is neatly organized, with menus available in the top part, allowing the user to switch easily between different editing panels.
Once the CLASS file has been loaded the user can view and edit its attributes from the Overview screen. Additional values that can be modified include the minor and major version, the access class and interfaces.

Working with the application

Editing the constant pool is also possible with dirtyJOE, along with adding new items. These actions can be carried out from the “Constant Pool” window, which offers the possibility to view the references for the selected item.
The “Fields” tab shows all the fields available in the file and allows editing their parameters and adding new entries to the list.
Methods present in the file are also subject to modifications and permit adding new data, deleting the old entries or copying the disassembly information to clipboard.
An important function present in the application is called Restore Bug Info and its purpose is to provide bytecode-level debugging for CLASS files, regardless of the source-level Java debugger used.

Complex utility for modifying compiled Java binaries

dirtyJOE is not a tool for the average user and good Java knowledge is required to work with the application. For users that meet this requirement it is flexible and very easy to use.