The last zoo Javan rhinoceros was the one at Adelaide Zoo between 1886 and 1907.
This animal was exhibited as an Indian rhinoceros during its lifetime; it wasn’t confirmed as a Javan rhino until it was examined in the Adelaide Museum years after its death.
According to IUCN Red List of Threatened Species there were no javanian rhinos identified in captivates in 2008.
I do not think that the situation has changed since.