How to install OpenJDK 8 on Debian 10 (Buster)
In this tutorial, I will show you how to install OpenJDK 8 on Debian 10 (Buster). 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
-
- Debian 10 (Buster) install with root access
apt install -y wget gnupg software-properties-common
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1. Add AdoptOpenJDK Repo
We need to add adopt OpenJDK repo in order to install OpenJDK 8 on Debian.
wget -qO - https://adoptopenjdk.jfrog.io/adoptopenjdk/api/gpg/key/public | sudo apt-key add -
sudo add-apt-repository --yes https://adoptopenjdk.jfrog.io/adoptopenjdk/deb/
2. Install Java 8
Here we will use apt to install Java 8 on Debian Buster
$ apt update -y
$ apt install adoptopenjdk-8-hotspot -y
3. Check java Version
Now after installing open JDK check the version using the following command
$ java -version
openjdk version "1.8.0_222"
OpenJDK Runtime Environment (AdoptOpenJDK)(build 1.8.0_222-b10)
OpenJDK 64-Bit Server VM (AdoptOpenJDK)(build 25.222-b10, mixed mode)
Read Also: How to install Java 11 on CentOS 7
4. 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
and paste 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 issues using this tutorial please feel free to comment below.
Reference: use this link
