JAVA version used by the VSE's can be found multiple ways.
1. Using the jcmd
jcmd 27263 VM.version
OpenJDK 64-Bit Server VM version 25.232-b09
2. ps aux | grep 27263
root 17429 0.4 6.7 5995260 1104984 pts/13 Sl 19:16 0:29 /usr/local/jdk1.8.0_65...
NOTE: In the above two options, 27263 is process id of the VSE.
3. In DevTest Enterprise Dashboard java version can be found by following the below steps:
. In ED, click on Registry which has VSE(s) as in below screenshot.
. In the next screen, click on Show All VSEs as in the below screenshot
. The next screen shows the java version and other information also.