Jar Browser

Jar Browser is a Swing app designed for searching across a large set of jar or zip files. It is great for answering the "where is that class located" question. It is especially useful when dealing with a system (like a J2EE server) that has tons of jar files you need to deal with. You can browse all jars from a directory tree, or from the CLASSPATH. Search for a class or file by name or partial name. Jar Browser can call out to "jad" to perform decompilation, which can make it an extremely useful debugging tool. Search for a class, decompile it, find a referenced class, then repeat.