Retrotranslator is a tool that makes Java applications compatible with Java 1.4, Java 1.3 and other environments.
good project retrotranslator
i have just started using it...would let you know after a while, how is it?
Retrotranslator saved my ass more than once. Some of my projects are still constrained to Java 1.4 (crappy Netweaver 7), and lots of useful libraries today require Java 1.5. (The only missing is a updated IntelliJ Idea plugin, but that's not this projects task.) Thanks!