Hi,
Please note that Precalculation Server is used to broadcast BW Workbooks.
Java stack is not required for broadcasting BW Workbooks using Precalculation Server.
RSPRECADMIN is the transaction code which gives information about BW Excel Workbook Precalc Admin
Please refer the following link which explains in detail about Precalculating and Distributing Workbooks:
http://help.sap.com/saphelp_nw70/helpdata/en/05/0e044017355c0ce10000000a1550b0/content.htm
Thanks & Regards,
Sapna