Installing Java on CentOS

Here I am going to explain how to install Open JDK Java 7 and Java 8 on CentOS. First, we need to install relevant JDK and JRE versions on your machine.

If you need to install Java 8, you can run following two commands on your machine:

sudo yum install java-1.8.0-openjdk
sudo yum install java-1.8.0-openjdk-devel

If you need to install Java 7, run following two commands:

sudo yum install java-1.7.0-openjdk
sudo yum install java-1.7.0-openjdk-devel

Then we need to identify the java home to set the JAVA_HOME environment variable. Therefore you need to run following command to identify the correct java_home. You can see the output as follows:

Now you can extract the java path from the above output and set the java_home as follows:

export JAVA_HOME=/usr/lib/jvm/java-1.7.0-openjdk-1.7.0.171–2.6.13.0.el7_4.x86_64/jre

then export the PATH variable:

export PATH=$PATH:$JAVA_HOME/bin

Now you have installed java on CentOS successfully :)