A commons VFS archive file system using TrueZip to allow R/W operations on zips. According to modular TrueZip nature, this project is also modular, allowing one to use only required compoent (which will pull the right TrueZip dependency tree).
Download JD-GUI to open JAR file and explore Java source code file (.class .java)
Click menu "File → Open File..." or just drag-and-drop the JAR file in the JD-GUI window commons-vfs-truezip-0.0.5.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.
