He might be doing it again. Check this out.
That's a whole lot less crazy than Johnston. Committing a regiment plus to that is questionable when he's trying to take Singapore and Manila and push quickly into Sumatra and Java, and is apparently going hard into the Bismark Sea area with more forces than was done historically. EDIT: In addition to the 16th Regiment, the inclusion of elements of the 4th Regiment imply he's ordered the bulk of the 2nd Division to plan for Midway.
As for holding Java, I don't think it's a realistic goal. The balance of forces is too extreme, I'd have to wipe out entire divisions in their boats while getting my own troop convoys across a sub-infested ocean unmolested. When I sink transports, I'm not saving Java or Sumatra, I'm saving some little island that he might otherwise take after he secures the oil-rich areas.