The decision to use Java for LimeWire has already been made and it will certainly not be changed.

There are people who like Java and there are people who don't, - personally I like Java, since it's a lot easier to work with (don't have to worry about memory management - etc.), and even more important is, that it's completely free and it runs on almost any system. If you don't like Java, you are free to use another client, however.