If you need to install OpenJDK-JRE 6 or OpenJDK-JDK 6 Java -version should display the choice you previously made. To make sure that you are running the correct version of Java, use this command to set your choice: sudo update-alternatives -config java Or look for icedtea-plugin in the Ubuntu Software Center. Or via a terminal sudo apt-get install icedtea-plugin If you want to develop Java programs then install the default-jdk package:Īlso important is to install the wrapper for supporting Java applications on your web browser, the Iced-Tea Java Plugin. The openjdk-11-jre package contains just the Java Runtime Environment. This installs openjdk-11-jre (at the time of writing this, you may install a newer java version in the future, which is now, if it installs a different openjdk version I guess) OpenJREīy opening a terminal and typing sudo apt-get install default-jre OpenJRE is the official implementation of Java Runtime Environment (JRE) for your Ubuntu systems and should suffice to run any Java program that you might require and it's included in the main repository and it's easily installable. deb releases from Ubuntu with reference to Sun Java or Oracle Java, Ubuntu officially supports OpenJDK and OpenJRE implementation of Java which is the base for Oracle's own implementation. Also, previous versions supplied on PPAs suffer from security issues and are not recommended to be installed on any Ubuntu system. Since Ubuntu 11.10 (Oneiric Ocelot) and due to license issues Ubuntu will no longer distribute Oracle's JDK and JRE. Oracle introduced with this implementation a license that prevents distribution.
The three most common implementations when talking about it for Ubuntu are: There are several implementations of Java.
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