This tutorial will help to install JAVA (OpenJDK) on all versions of Ubuntu, Debian, and LinuxMint systems. You can also use this tutorial to install Java on any Debian based systems. Let’s follow the below simple steps for the installation.
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Step 1 – Search OpenJDK Packages
OpenJDK packages are available under native apt repositories. You can simply use apt-cache search command to search the available java version for your Ubuntu system.
apt-cache search openjdk
As per above output, you can see openjdk-11-* and openjdk-8-* is available in the package manager.
Step 2 – Install JAVA (OpenJDK)
Use the below command to install OpenJDK on your Debian based systems using the package manager from the default repository. The below commands will install Java Development Kit (JDK) and Java Runtime Environment (JRE) both on your system. You can install JRE package only to setup Runtime Environment only.
sudo apt-get install openjdk-11-jre openjdk-11-jdk
sudo apt-get install openjdk-8-jre openjdk-8-jdk
Step 3 – Configure Default Java Version
After installation of Java uses below command to verify the installed version of Java on your system.
java -version openjdk version "11.0.4" 2019-07-16 LTS OpenJDK Runtime Environment 18.9 (build 11.0.4+11-LTS) OpenJDK 64-Bit Server VM 18.9 (build 11.0.4+11-LTS, mixed mode, sharing)
Step 4 – Set JAVA_HOME
Its the best practice to set Java environment variable after installing java. To setup
JAVA_HOME add following line to
/etc/environment file, Path may be differ with your system architecture.
echo "JAVA_HOME=/usr/lib/jvm/java-11-openjdk-amd64/" >> /etc/environment source /etc/environment
Use the following command to check the environment value
echo $JAVA_HOME /usr/lib/jvm/java-11-openjdk-amd64/