{"id":3579,"date":"2023-11-17T17:23:39","date_gmt":"2023-11-17T09:23:39","guid":{"rendered":"https:\/\/www.servergigabit.com\/guide\/?post_type=kb&p=3579"},"modified":"2026-03-16T14:11:15","modified_gmt":"2026-03-16T06:11:15","slug":"java-on-ubuntu-7-steps-install-java","status":"publish","type":"kb","link":"https:\/\/www.servergigabit.com\/guide\/kb\/java-on-ubuntu-7-steps-install-java","title":{"rendered":"Java on Ubuntu: 7 Easy and Powerful Steps to Install"},"content":{"rendered":"
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\"Java<\/div>\n<\/header>\n
\n

Java<\/a> is a widely used programming language that is essential for developing and running applications on various platforms. This guide provides a step-by-step process for installing Java on Ubuntu 18.04, 20.04, and 22.04 using the Apt-Get package manager. Additionally, it explains how to switch between different Java versions and set the JAVA_HOME environment variable.<\/p>\n

<\/span>Installation of the Default JRE\/JDK<\/strong><\/h2>\n

The default JRE and JDK can be installed using the following commands:<\/p>\n

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apt-get install default-jre\r\napt-get install default-jdk<\/code><\/pre>\n<\/div>\n
The JDK includes the JRE, so you can install the JDK instead of the JRE if you need both.<\/em><\/p>\n
<\/span>Installing other Java Versions<\/strong><\/h2>\n
Older versions of Java can be installed using the following commands:<\/p>\n
\n
apt-get install openjdk-8-jdk -y\r\napt-get install openjdk-8-jre -y<\/code><\/pre>\n<\/div>\n
Replace “8” with the desired Java version, such as 11, 16, or 17.<\/em><\/p>\n
<\/span>Switching between different Java Versions\u00a0<\/strong><\/h2>\n
It is possible to have several Java versions installed at the same time, but only one Java version is selected or active at a time.<\/p>\n
You can switch between different Java versions using the following command:<\/p>\n
\n
sudo update-alternatives --config java\r\n\"How<\/picture><\/code><\/pre>\n<\/div>\n
This will display a list of installed Java versions.<\/span> Select the desired Java version by entering its corresponding number.<\/span><\/em><\/p>\n
<\/span>How to set the \u201cJAVA_HOME\u201d environment Variable<\/strong><\/h2>\n
The JAVA_HOME environment variable points to the root directory of the Java installation.<\/span> To set the JAVA_HOME variable,<\/span> follow these steps:<\/span><\/p>\n
    \n
  1. Run the following command to get the path of the desired Java version:<\/span><\/li>\n<\/ol>\n
    \n
    sudo update-alternatives --config java\r\n\"How<\/picture><\/code><\/pre>\n<\/div>\n
      \n
    1. Open the following file:<\/span><\/li>\n<\/ol>\n
      \n
      sudo nano \/etc\/environment<\/code><\/pre>\n<\/div>\n
        \n
      1. Add the following line to the file:<\/span><\/li>\n<\/ol>\n
        \n
        JAVA_HOME=\"YOUR_PATH\"<\/span><\/code><\/pre>\n<\/div>\n
          \n
        1. \n
          Replace “YOUR_PATH” with the actual path of the Java version.<\/span><\/p>\n<\/li>\n
        2. \n
          Save the file and close the editor.<\/span><\/p>\n<\/li>\n
        3. \n
          Reload the configuration file:<\/span><\/p>\n<\/li>\n<\/ol>\n
          \n
          source<\/span> \/etc\/environment<\/code><\/pre>\n<\/div>\n
            \n
          1. Verify that the JAVA_HOME variable is set correctly:<\/span><\/li>\n<\/ol>\n
            \n
            echo<\/span> $JAVA_HOME<\/span><\/code><\/pre>\n<\/div>\n
            Congrats!\u00a0Now you know how to install different versions of Java and how to switch between them.<\/p>\n
            Conclusion<\/strong><\/h2>\n
            This guide has provided comprehensive instructions for installing and managing Java on Ubuntu 18.<\/span>04,<\/span> 20.<\/span>04,<\/span> and 22.<\/span>04.<\/span> By following these steps,<\/span> you can easily install the desired Java version,<\/span> switch between different versions,<\/span> and set the JAVA_HOME environment variable.<\/span><\/p>\n
            \n<\/div>\n","protected":false},"excerpt":{"rendered":"
            Java is a widely used programming language that is essential for developing and running applications on various platforms. This guide provides a step-by-step process for installing Java on Ubuntu 18.04, 20.04, and 22.04 using the Apt-Get package manager. Additionally, it explains how to switch between different Java versions and set the JAVA_HOME environment variable. Installation of the Default JRE\/JDK The…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"kbtopic":[1099],"kbtag":[1216,1109],"class_list":["post-3579","kb","type-kb","status-publish","hentry","kbtopic-tutorials","kbtag-java","kbtag-ubuntu"],"_links":{"self":[{"href":"https:\/\/www.servergigabit.com\/guide\/wp-json\/wp\/v2\/kb\/3579","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.servergigabit.com\/guide\/wp-json\/wp\/v2\/kb"}],"about":[{"href":"https:\/\/www.servergigabit.com\/guide\/wp-json\/wp\/v2\/types\/kb"}],"author":[{"embeddable":true,"href":"https:\/\/www.servergigabit.com\/guide\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.servergigabit.com\/guide\/wp-json\/wp\/v2\/comments?post=3579"}],"version-history":[{"count":7,"href":"https:\/\/www.servergigabit.com\/guide\/wp-json\/wp\/v2\/kb\/3579\/revisions"}],"predecessor-version":[{"id":6308,"href":"https:\/\/www.servergigabit.com\/guide\/wp-json\/wp\/v2\/kb\/3579\/revisions\/6308"}],"wp:attachment":[{"href":"https:\/\/www.servergigabit.com\/guide\/wp-json\/wp\/v2\/media?parent=3579"}],"wp:term":[{"taxonomy":"kbtopic","embeddable":true,"href":"https:\/\/www.servergigabit.com\/guide\/wp-json\/wp\/v2\/kbtopic?post=3579"},{"taxonomy":"kbtag","embeddable":true,"href":"https:\/\/www.servergigabit.com\/guide\/wp-json\/wp\/v2\/kbtag?post=3579"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}