The aim of “Java Decompiler” project is to develop tools to decompile and analyze Java 5, and upper, “.class” files.

Some facts:
The final release of JSR 176, defining the major features of the J2SE 5.0, has been published the september 30, 2004.
The lastest Java version supported by JAD, the famous Java decompiler written by Mr. Pavel Kouznetsov, is 1.3.
Most of Java decompilers downloadable today from Internet, such as “DJ Java Decompiler” or “Cavaj Java Decompiler”, are powered by JAD : they can not display Java 5 sources.

JD-Core is a freeware library that reconstructs Java source code from one or more “.class” files. JD-Core may be used to recover lost source code and explore the source of Java runtime libraries. New features of Java 5, such as annotations, generics or type “enum”, are supported. JD-GUI includes JD-Core library.

JD-GUI is a standalone graphical utility that displays Java source codes of “.class” files. You can browse the reconstructed source code with the JD-GUI for instant access to methods and fields.

JD-Core and JD-GUI are free for non-commercial use. This means that JD-Core and JD-GUI shall not be included or embedded into commercial software products. Nevertheless, JD-Core and JD-GUI may be freely used for personal needs in a commercial or non-commercial environments.

* JD-Core and JD-GUI are written in C++. This allows an extremely fast decompilation and a display.
* JD-Core does not require the Java runtime environment for its functioning, therefore no special setup is required.
* JD-Core works with most current compilers including the following:
o jdk1.1.8
o jdk1.3.1
o jdk1.4.2
o jdk1.5.0
o jdk1.6.0
o jikes-1.22
o harmony-jdk-r533500
o Eclipse Java Compiler v_677_R32x, 3.2.1 release
o jrockit90_150_06
* JD-Core supports the following new features of Java 5:
o Annotations
o Generics
o Type “enum”
* JD-GUI supports Drag and Drop.
* JD-GUI supports JAR files.
* JD-GUI displays color coded Java source code.
* JD-GUI allows you to browse the “class” files hierarchy.
* JD-GUI displays “log” files, and allow you to decompile “class” files appearing in Java stack traces.
* JD-Core and JD-GUI use the excellent cross-platform wxWidgets toolkit.

09112008
JD-GUI 0.2.5 is ready. It includes minor changes but some important improvments have been added to the core of decompiler. Test it!
08032008
JD-GUI 0.2.4 is out ! In addition to bug fixes, it includes a new feature to inform you of the availability of new versions.

Download:

for windows
http://java.decompiler.free.fr/jd-gui/downloads/jd-gui-0.2.5.windows.zip

for linux i686
http://java.decompiler.free.fr/jd-gui/downloads/jd-gui-0.2.5.linux.i686.tar.gz

for osx i686
http://java.decompiler.free.fr/jd-gui/downloads/jd-gui-0.2.5.osx.i686.dmg

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