Along with MacOS X, Apple's Xcode IDE even had native java project support briefly in this era as well.
We didn't touch a fairly esoteric language called Python much. Because we saw the future. Java and IPv6 was about to change everything.
It was definitely the thing for a while. Although I remember my very first steps with Java and Swing and my primary impression was "this is so slow".
One of the versions of the most popular game in the world is written in Java, and it's quite capable of being very fast.