The Default System Properties file for iSeries' JVM is located in: 

/QIBM/UserData/Java400/SystemDefault.properties

Valid Values in this file are:

PS: for jvm version 1.3 installation verify output of command: 

DSPDTAARA QJAVA/SF99067
It should show a PTF value of 'SF99067-06' along with a date. V4R4M0 must be installed, with PTF CUM package C0147440 or later, and licpgm 5769-JV1 Option *BASE installed.

(c)2003 Paul T.Threshold