My setup for Dutch East Indies for my game if your interested in is
Sumatra 2 inf
Borneo 2 inf
Celebes 2 inf
Dutch New Guinea 1 inf
Java 1 inf 1 tank
Cruiser, Destroyer and a sub in Java sea zone with a naval base.

Argo is correct in a way. J
there were a lot of tanks on Java, but most ships were in Java sea zone. When it was attacked Dutch only had 5 ships but allies had some there to.
Not a fan of an IC on Dutch East Indies. Japan just take and use plus collect 11 icps if game has can capture IC and use next turn.