How to change "which java" path to the desired Java version

- open .bash_profile and add the following to make java version as needed ( I needed this for jenkins and maven project as mvn install was failing from the ci_workflow job

 export JAVA_HOME=/usr/lib/jvm/java-11-openjdk-11.0.9.11-0.el7_9.x86_64

export PATH=$JAVA_HOME/bin:$PATH

- simply source the .bash_profile

[root@katello ~]# which java

/usr/lib/jvm/java-11-openjdk-11.0.9.11-0.el7_9.x86_64/bin/java

[root@katello ~]# java -version

openjdk version "11.0.9" 2020-10-20 LTS

OpenJDK Runtime Environment 18.9 (build 11.0.9+11-LTS)

OpenJDK 64-Bit Server VM 18.9 (build 11.0.9+11-LTS, mixed mode, sharing)

[root@katello ~]# date

Tue Dec  8 12:28:18 IST 2020