The use of 64-bit JDK/JRE at the application side is not supported.
Only the client JRE can use the 64-bit Java.
Check the documents provided by Krishna in addition to this one:
Deploying JRE (Native Plug-in) for Windows Clients in Oracle E-Business Suite Release 12 (Doc ID 393931.1)
No. I am taking at OS level. I have 32bit EBS. I want this 32bit EBS to use 64bit java( os is 64bit)
I Second Bashar.
Thats what is supported with R12.1. above shared links will clear that.
Actually MOS notes specifically says not to download 64-bit
on ebs env can you run this and update