Today, I faced this error in the ArcGIS Server Java Platform, "The ArcGIS Server Manager service on Local Computer started and then stopped..."
Actually the server was running fine. I decided to change the service account of ArcGIS Manager, Container, SOC monitor. So I did post install to change with service account used for the ArcGISSOM and ArcGISSOC. After I did post install, i added the new account in the agsuser&agsadmin. The ArcGIS Server manager service is down, but the ArcGIS Object Container server, SOC monitor is up and running.. When I manually tried to start, it shown the error.
I have gone through the ESRI site link, http://support.esri.com/en/knowledgebase/techarticles/detail/33737,
I verified all the solutions given in this ESRI link, (except repair option) and I didn't find any change required.
Then I changed the logon account as "Local Computer", in the properties of the ArcGIS Manager service window. It started to run without any problem. So, i decided it is not a problem in install or post install, it is just permission problem.
I gave the complete permission/access to the ArcGIS folder in program files and the c:\arcgisserver folder to the new service account that I used in the post install.
After this change, the ArcGIS server manager started to run without any problem.
I think, giving permissions to Java folder in .. programfile/arcgis will also work. pls. give a try..