If you want to set the environment variables for a particular user, you need to place the above variables in the following file. Load the environments with the following command: source /etc/profile.d/java.sh export PATH=$PATH:/usr/lib/jvm/java-11-openjdk-amd64/bin/Įxport JAVA_HOME=/usr/lib/jvm/java-11-openjdk-amd64/Įxport J2SDKDIR=/usr/lib/jvm/java-11-openjdk-amd64/ Now, change the variables path based on the Java location in your Ubuntu 20.04 LTS. You can create a file in /etc/profile.d directory to place the variables for your users. java -version Setup Environmental Variables In Ubuntu 20.04 LTS Run the following command to verify your JAVA version.
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sudo apt install default-jdk or sudo apt install openjdk-11-jdk The above command will install the default version of Java JDK-11 on your system. If Java is not installed on your system then use the following command to install the Java JDK. You will see multiple options if you have different versions installed in your system: sudo update-alternatives -config java Install Java JDK 11 (the Ubuntu Default) By default, Ubuntu 20.04 includes the Java 11 JDK. Run the update-alternatives command to set the default java version. sudo update-alternatives -install /usr/bin/java java /usr/lib/jvm/jdk-14.0.1/bin/java 1 Download the latest Java SE Development Kit 17 LTS release from it from the link below. At the time of this writing, the latest Oracle Java version is 17. deb package then it will be installed in /usr/lib/jvm directoryĬreate a symbolic link for Java with Oracle JDK. If prefer to install Oracle JAVA instead of the open source version above then use the steps below. Sudo tar -zxvf jdk-8u251-linux-圆4.tar.gz -C /usr/lib/jvm/īy default, If you install Oracle JDK via. Install Oracle Java JDK In Ubuntu 20.04 LTS using the apt command. In an alternative method, you can download and install Oracle JAVA via command line: wget -no-check-certificate -no-cookies -header "Cookie: oraclelicense=accept-securebackup-cookie" You can use either the command line or browser to download the JDK in Ubuntu 20.04 LTS. There is no separate Java Runtime Environment as Oracle JDK v9.x and above now includes JRE as well. Java JRE 8 sudo apt install -y openjdk-8-jre-headless Java JRE 11 # sudo apt install -y openjdk-11-jre-headless Java JRE 8 sudo apt install -y openjdk-8-jreĭefault JRE ie JRE 11 sudo apt install -y default-jre-headless Java JRE 11 sudo apt install -y openjdk-11-jre Java JDK 8 sudo apt install -y openjdk-8-jdk-headlessĭefault JRE ie JRE 11 sudo apt install -y default-jre
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Java JDK 11 sudo apt install -y openjdk-11-jdk-headless Java JDK 8 sudo apt install -y openjdk-8-jdkĭefault JDK ie JDK 11 sudo apt install -y default-jdk-headless
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Java JDK 11 sudo apt install -y openjdk-11-jdk JDK ( Default JDK 11) sudo apt install -y default-jdk
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Install OpenJDK or Oracle Java as per your requirement.įirst, update the repository index. JRE: JAVA Runtime Environment or JRE is for running Java applications.