How to install Java 8 on CentOS 7/ Redhat 7

How to install Java 8 on CentOS 7

In this tutorial, I will show you how to install Java 8 on Centos 7. The Java Development Kit (JDK) is a software development environment used for developing Java applications and applets. It includes the Java Runtime Environment (JRE), an interpreter/loader (java), a compiler (javac), an archiver (jar), a documentation generator (Javadoc) and other tools needed in Java development.

Pre-requisites

  • Centos 7 install with root access

Read Also: Install postgreSQL 11 on Debian 10 (Buster)

Install Java 8

Here we will use yum to install Java 8 on Centos 7.

yum instal$ l java-1.8.0-openjdk

Check java Version

Now after installing open JDK check the version using the following command

$ java -version
openjdk version "1.8.0_191"
OpenJDK Runtime Environment (build 1.8.0_191-b12)
OpenJDK 64-Bit Server VM (build 25.191-b12, mixed mode)

Set Java Home Environment

We need to set Java home Environment Variable in order to use java with some applications. Let’s get started.

$ alternatives --config java
There is 1 program that provides 'java'.
Selection Command
-----------------------------------------------
*+ 1 java-1.8.0-openjdk.x86_64 (/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.191.b12-1.el7_6.x86_64/jre/bin/java)

Option 1: Set Environment Variable

$ export JAVA_HOME=/usr/lib/jvm/java-11-openjdk-11.0.1.13-3.el7_6.x86_64/bin/java

$ echo $JAVA_HOME
/usr/lib/jvm/java-11-openjdk-11.0.1.13-3.el7_6.x86_64/bin/java

Option 2: Adding in .bash_profile

In this option, I will add an entry in .bash_profile.

$ vim ~/.bash_profile

and paste the following and save and quit.

$ export JAVA_HOME=/usr/lib/jvm/java-11-openjdk-11.0.1.13-3.el7_6.x86_64/bin/java

Now source the file.

$ source ~/.bash_profile

Now check the Java Home

$ echo $JAVA_HOME
/usr/lib/jvm/java-11-openjdk-11.0.1.13-3.el7_6.x86_64/bin/java

If you have any issue using this tutorial please feel free to comment below.

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