I have an application that was custom built for me and I need to get into it to make some changes. The file extension is .jar. I know that .jar files are just archive files, but this is the file I launch to run the program. It doesn't actually unarchive anything (afaik) but is the pplication file itself. Normally I could right click and "show package contents" for most apps, but since this is a .jar file that's not an option. Any ideas on how to get at the code?