I am looking best Java decomplier available in the market (Ready to buy commercial version) which support JDK 1.4.2 class files (Must). I am working in the migration project which has deployed in the server 2002 to 2004 and doesn't have source code. I am looking for java decomplier which support instantly convert multiple class file to java file. For example, If I choose the parent folder, it should convert all the class files which includes sub folder class files also. I don't want to do it for each class file. We have huge number of class file, which should convert instantly and get source file as much as possible match with original source code.
Most (free) decompilers work with Java 1.4 class files; in fact, most of them have not been updated for Java 5 class files (generics and all that). JODE (on SourceForge) is a good open source option. JAD is a native Windows tool that's also decent. You may want to try a few different ones to get a feel for which works best with your particular class files.