I think that you can be successful with either language,
Our team uses LabVIEW and we keep using it because it was used since our rookie year and we gained experience with it.
I think you should consider the following things in your decision:
1) How many students on the team have already had a season using Java?
Experience is something you should maintain and a transition may be a struggle.
2) How many new students came with no programming experience?
As far as I know it's much easier to teach LabVIEW to new programmers.
3) Are there any mentors on the team that know Java or LabVIEW already?
Mentor support is always good, if you have a mentor that knows Java you should consider staying.
4) What programming languages does other teams use around you?
Getting support from other teams around you can help solve problems faster, even during build season.
Hope it helped,
בהצלחה
