Bash command to check if Oracle or OpenJDK java version is installed on Linux
JavaLinuxBashJava Problem Overview
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)
Java Solutions
Solution 1 - Java
if [[ $(java -version 2>&1) == *"OpenJDK"* ]]; then echo ok; else echo 'not ok'; fi
Solution 2 - Java
java -version 2>&1 | grep "OpenJDK Runtime" | wc -l
returns 0 if using Oracle JDK, 1 if using OpenJDK
Bash condition:
if [[ $(java -version 2>&1 | grep "OpenJDK Runtime") ]]
Solution 3 - Java
You can use below shell script for you work:
#!/bin/bash
declare -a JAVA=($(sudo find / -name java | grep -v grep | grep "/bin/java"))
for javapath in "${JAVA[@]}"
do
if [[ $(sudo ${javapath} -version 2>&1) != *"OpenJDK"* ]]; then
export JAVAVER=$(${javapath} -version 2>&1);
echo "Java Location -- ${javapath}"
echo "${JAVAVER}"
fi
done
NOTE: This will cover all java executable files running on you hosts.