Install Java 8 on CentOS/RHEL 7.x

If you have a fresh installation, it is recommended to run the update first
yum update
Usually Java comes installed on CentOS 7 (Everything), for CentOS 7 minimal you may need to install Java for various setups. On a CentOS 7 Everything, you can verify it by simply checking the version:
java -version

The output:

# java -version
openjdk version "1.8.0_111"
OpenJDK Runtime Environment (build 1.8.0_111-b15)
OpenJDK 64-Bit Server VM (build 25.111-b15, mixed mode)
Java 1.8.0_111-b15 is the latest available, ‘1.8.0’ states it is Java 8, ‘u111’ means update 111, and ‘b15’means build 15.
For CentOS 7 minimal, the same command will give a different output:
# java -version
-bash: java: command not found
Which means Java is not installed. The latest Java version currently is Java 8.

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