Install OpenJDK 8 on Ubuntu 19
In this tutorial, I will show you how to install OpenJDK 8 on Ubuntu 19. 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
- Ubuntu 19 installed with root access
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Read Also: Install OpenJDK 8 on Ubuntu 16
Install OpenJDK 8
Here we will use apt to install Java 8 on Ubuntu 19
$ sudo apt install openjdk-8-jdk
Check java Version
Now after installing open JDK check the version using the following command
$ java -version
openjdk version "1.8.0_212"
OpenJDK Runtime Environment (build 1.8.0_212-8u212-b03-0ubuntu1.19.04.2-b03)
OpenJDK 64-Bit Server VM (build 25.212-b03, mixed mode)
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Set Java Home Environment
We need to set Java home Environment Variable in order to use java with some applications. Let’s get started.
$ sudo update-alternatives --config java
There is only one alternative in link group java (providing /usr/bin/java): /usr/lib/jvm/java-8-openjdk-amd64/jre/bin/java
Nothing to configure.
Option 1: Set Environment Variable
$ export JAVA_HOME=/usr/lib/jvm/java-8-openjdk-amd64/jre/bin/java
$ echo $JAVA_HOME
/usr/lib/jvm/java-8-openjdk-amd64/jre/bin/java
Option 2: Adding in .bash_profile
In this option, I will add an entry in .bash_profile.
$ vim ~/.bash_profile
add the following and save and quit.
$ export JAVA_HOME=/usr/lib/jvm/java-8-openjdk-amd64/jre/bin/java
Now source the file.
$ source ~/.bash_profile
Now check the Java Home
$ echo $JAVA_HOME
/usr/lib/jvm/java-8-openjdk-amd64/jre/bin/java
If you have any issue using this tutorial please feel free to comment below.