Bash command to check if Oracle or OpenJDK java version is installed on Linux

Question

I need a bash line to check if java version currently installed is Oracle's or OpenJDK.

A one-liner by parsing the output of the java -version command:

java -version 

java Oracle output:

java version "1.7.0_80" Java(TM) SE Runtime Environment (build 1.7.0_80-b15) Java HotSpot(TM) 64-Bit Server VM (build 24.80-b11, mixed mode) 

java OpenJDK Output:

java version "1.7.0_91" OpenJDK Runtime Environment (amzn-2.6.2.2.63.amzn1-x86_64 u91-b00) OpenJDK 64-Bit Server VM (build 24.91-b01, mixed mode) 

Answer 1

if [[ $(java -version 2>&1) == *"OpenJDK"* ]]; then echo ok; else echo 'not ok'; fi