$ sudo apt-get install openjdk-11-jdk
Install OpenJDK 11 on Ubuntu 18.04 LTS
Upasana | November 23, 2019 | 2 min read | 786 views
We will learn how to install openjdk-11 on ubuntu 18.04 LTS, setting the default java version and setting up java home.
Install OpenJDK-11
The below command will install OpenJDK (Java Development Kit) version 11 on your Debian based system (Ubuntu 18)
Install OpenJDK 11
Configure default Java version
Once we have installed java, we can use below command to verify the version.
Check java version
$ java -version
java version "11.0.5" 2019-10-15 LTS
Java(TM) SE Runtime Environment 18.9 (build 11.0.5+10-LTS)
Java HotSpot(TM) 64-Bit Server VM 18.9 (build 11.0.5+10-LTS, mixed mode)In order to list all the JDK installs available on your system, run the below command:
List all java installs
$ update-java-alternatives -l
java-1.11.0-openjdk-amd64 1111 /usr/lib/jvm/java-1.11.0-openjdk-amd64
java-1.8.0-openjdk-amd64 1081 /usr/lib/jvm/java-1.8.0-openjdk-amd64
java-8-oracle 1081 /usr/lib/jvm/java-8-oracleChanging the default JDK is easy using update-alternatives utility in Ubuntu.
Change the default version
$ sudo update-alternatives --config java
Set JAVA_HOME
We shall setup JAVA_HOME environment variable to appropriate java version so that other tools and libraries for example Gradle picks up the proper version.
On Ubuntu, we shall use /etc/environment to set the JAVA_HOME
$ sudo vi /etc/environment
Add the below line towards the end of this file
JAVA_HOME="/usr/lib/jvm/java-11-openjdk-amd64/"
Source the newly set JAVA_HOME
source /etc/environment
Check the JAVA_HOME
$ echo $JAVA_HOME
/usr/lib/jvm/java-11-openjdk-amd64/That’s all for now.
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