I've inherited a .ear application that was written using Java 2 Platform Std. Ed. v1.4.2. I need to modify it, and any sample code I'm finding is in Java 5 or 6. If I upgrade my Java version, can I feel comfortable that my application will still run? Or should I stick with my archaic version of Java to be safe?
I'm a Java newbie, so any advice will be appreciated.