NavExpress DJ Java Decompiler 3.2.2: Class File to Java File De-constructor
First let me say, decompiling code is not necessarily related to software piracy. Original source code sometimes gets misplaced, or perhaps you don't know what version of an open source class you are using. In any case, there are legitimate reasons to want to get code out of an already compiled Java class file(Note: if you wish to avoid others from doing this to your code, use a Java Obfuscator). There are a number of tools available that will perform this task. On preliminary observations, NavExpress' DJ looks like a good one.
DJ is easy to install, and is very simple, click the open button or go to File >> Open and navigate to the class file to decompile and voila! Seriously, that's it. I decompiled a servlet I had written and compared it to my original source and it was nearly identical, it was even a little more syntactically correct. It had correct import statements (as opposed to my wildcards) and casted some get() methods to ensure that objects match. Of course the comments weren't there, but everything else was pretty good. I even decompiled a class file from a well-known (and commercial) Java application. There was the code, plain to see.
DJ is actually quite a bit more than just a decompiler. In addition, DJ is a pretty good little Java editor. It has syntax coloring, so code is easy to read. You can compile code right from within the editor and view applets. It also has a built-in archive viewer and creator tool. The help and other related documentation is one of the best I've seen as far as freeware applications go. All in all, I think this is a good tool to have in the arsenal. In all honesty, I liked it better than the JavaJar stand-alone tool. I definitely will not be running the uninstaller on this one.
NavExpress DJ Java Decompiler is freeware (credits and donations should go out to Atanas Neshkov). It is a non-Java application (no JVM required) developed for Windows 95/98/Me/NT/2000/XP. Intel Pentium processor of 200 Mhz or higher and 32 MB RAM are required (64MB RAM recommended).
[More Info and download DJ Java Decompiler]
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