{"id":48283,"date":"2024-05-08T12:30:00","date_gmt":"2024-05-08T17:30:00","guid":{"rendered":"https:\/\/www.rosehosting.com\/blog\/?p=48283"},"modified":"2024-04-29T02:43:40","modified_gmt":"2024-04-29T07:43:40","slug":"how-to-install-java-21-on-ubuntu-24-04","status":"publish","type":"post","link":"https:\/\/www.rosehosting.com\/blog\/how-to-install-java-21-on-ubuntu-24-04\/","title":{"rendered":"How to Install Java 21 on Ubuntu 24.04"},"content":{"rendered":"<div id=\"bsf_rt_marker\"><\/div>\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/www.rosehosting.com\/blog\/wp-content\/uploads\/2024\/05\/how-to-install-java-on-ubuntu-24-04.webp\" alt=\"How to Install Java on Ubuntu 24.04\" class=\"wp-image-48393\" srcset=\"https:\/\/www.rosehosting.com\/blog\/wp-content\/uploads\/2024\/05\/how-to-install-java-on-ubuntu-24-04.webp 1024w, https:\/\/www.rosehosting.com\/blog\/wp-content\/uploads\/2024\/05\/how-to-install-java-on-ubuntu-24-04-300x169.webp 300w, https:\/\/www.rosehosting.com\/blog\/wp-content\/uploads\/2024\/05\/how-to-install-java-on-ubuntu-24-04-150x84.webp 150w, https:\/\/www.rosehosting.com\/blog\/wp-content\/uploads\/2024\/05\/how-to-install-java-on-ubuntu-24-04-768x432.webp 768w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<p>Java is a high-class object-oriented programming language that lets programmers or administrators run everywhere without recompiling. Java code is compiled and can run on any Java virtual machine regardless of the underlying computer architecture. The Oracle corporation maintains Java and has automatic garbage collection, which means that it automatically manages the memory and helps the programmer avoid doing that task manually. Learning how to install Java 21 on Ubuntu 24.04 is a straightforward process that may take up to 15 minutes. Let&#8217;s get started!<\/p>\n\n\n\n<!--more-->\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_65 counter-hierarchy ez-toc-counter ez-toc-transparent ez-toc-container-direction\">\n<p class=\"ez-toc-title\">Table of Contents<\/p>\n<label for=\"ez-toc-cssicon-toggle-item-663ddb1a910df\" class=\"ez-toc-cssicon-toggle-label\"><span class=\"ez-toc-cssicon\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/label><input type=\"checkbox\"  id=\"ez-toc-cssicon-toggle-item-663ddb1a910df\"  aria-label=\"Toggle\" \/><nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.rosehosting.com\/blog\/how-to-install-java-21-on-ubuntu-24-04\/#Prerequisites-to-install-Java-21-on-Ubuntu-2404\" title=\"Prerequisites to install Java 21 on Ubuntu 24.04\">Prerequisites to install Java 21 on Ubuntu 24.04<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.rosehosting.com\/blog\/how-to-install-java-21-on-ubuntu-24-04\/#1-Update-the-system\" title=\"1. Update the system\">1. Update the system<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.rosehosting.com\/blog\/how-to-install-java-21-on-ubuntu-24-04\/#2-Install-Java-from-the-default-repository\" title=\"2. Install Java from the default repository\">2. Install Java from the default repository<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.rosehosting.com\/blog\/how-to-install-java-21-on-ubuntu-24-04\/#3-Install-Oracle-Java\" title=\"3. Install Oracle Java\">3. Install Oracle Java<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.rosehosting.com\/blog\/how-to-install-java-21-on-ubuntu-24-04\/#4-Switch-between-Java-versions\" title=\"4. Switch between Java versions\">4. Switch between Java versions<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.rosehosting.com\/blog\/how-to-install-java-21-on-ubuntu-24-04\/#You-successfully-installed-Java-21-on-Ubuntu-2404\" title=\"You successfully installed Java 21 on Ubuntu 24.04\">You successfully installed Java 21 on Ubuntu 24.04<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Prerequisites-to-install-Java-21-on-Ubuntu-2404\"><\/span>Prerequisites to install Java 21 on Ubuntu 24.04<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<ul>\n<li>A <a href=\"https:\/\/www.rosehosting.com\/ubuntu-hosting\/\" target=\"_blank\" rel=\"noreferrer noopener\">server running Ubuntu 24.04<\/a> or any Linux OS<\/li>\n\n\n\n<li>User privileges: root or non-root user with sudo privileges<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"1-Update-the-system\"><\/span>1. Update the system<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Before we start to install anything on the server, we need to update the system packages to the latest versions available:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">sudo apt update -y &amp;&amp; sudo apt upgrade -y<\/pre>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"2-Install-Java-from-the-default-repository\"><\/span>2. Install Java from the default repository<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>In Ubuntu 24.04, the default Java development repository is set to Java 21. So, there is no need to download the repo, adding GPG keys manually. We can install Java Development Kit 21 with the following command:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">sudo apt install openjdk-21-jdk -y<\/pre>\n\n\n\n<p>Once installed, we can check the Java version with the command below:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">java -version<\/pre>\n\n\n\n<p>You should receive the following output:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">root@host:~# java -version\nopenjdk version \"21.0.2\" 2024-01-16\nOpenJDK Runtime Environment (build 21.0.2+13-Ubuntu-2)\nOpenJDK 64-Bit Server VM (build 21.0.2+13-Ubuntu-2, mixed mode, sharing)\n<\/pre>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"3-Install-Oracle-Java\"><\/span>3. Install Oracle Java<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Oracle Java can not be installed with one command because it is not included in the default Ubuntu 24.04 repository. We need to download the package manually with the wget and install it. So, to download Oracle Java 21, execute the following command:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">wget https:\/\/download.oracle.com\/java\/21\/latest\/jdk-21_linux-x64_bin.deb<\/pre>\n\n\n\n<p>Once downloaded, you can install the package with the command below:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">sudo apt install .\/jdk-21_linux-x64_bin.deb<\/pre>\n\n\n\n<p>If you execute the command <b>java -version<\/b>, you will get the same output as before:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">root@host:~# java -version\nopenjdk version \"21.0.2\" 2024-01-16\nOpenJDK Runtime Environment (build 21.0.2+13-Ubuntu-2)\nOpenJDK 64-Bit Server VM (build 21.0.2+13-Ubuntu-2, mixed mode, sharing)\n<\/pre>\n\n\n\n<p>This is because we installed Java OpenJDK 21 first, and it is set as the default version. In the next paragraph, we will explain how to switch between different versions of Java.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"4-Switch-between-Java-versions\"><\/span>4. Switch between Java versions<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>On a system with multiple Java versions, we can change the active version very easily. To do that, execute the following command:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">sudo update-alternatives --config java<\/pre>\n\n\n\n<p>You should receive the following output:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">root@host:~# sudo update-alternatives --config java\nThere are 2 choices for the alternative java (providing \/usr\/bin\/java).\n\n  Selection    Path                                         Priority   Status\n------------------------------------------------------------\n  0            \/usr\/lib\/jvm\/jdk-21-oracle-x64\/bin\/java       352337920 auto mode\n<b>* 1            \/usr\/lib\/jvm\/java-21-openjdk-amd64\/bin\/java   2111      manual mode<\/b>\n  2            \/usr\/lib\/jvm\/jdk-21-oracle-x64\/bin\/java       352337920 manual mode\n\nPress <enter> to keep the current choice[*], or type selection number:\n<\/enter><\/pre>\n\n\n\n<p>As you can see, the selected Java is Java OpenJDK 21. If we want to choose the Java Oracle, we need to type <b>2<\/b> and hit Enter. After changing the Java version, you should receive the following output:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">Press <enter> to keep the current choice[*], or type selection number: 2\nupdate-alternatives: using \/usr\/lib\/jvm\/jdk-21-oracle-x64\/bin\/java to provide \/usr\/bin\/java (java) in manual mode\n<\/enter><\/pre>\n\n\n\n<p>After this, you can execute the <b>java -version<\/b> to check the output:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">root@host:~# java -version\njava version \"21.0.2\" 2024-01-16 LTS\nJava(TM) SE Runtime Environment (build 21.0.2+13-LTS-58)\nJava HotSpot(TM) 64-Bit Server VM (build 21.0.2+13-LTS-58, mixed mode, sharing)\n<\/pre>\n\n\n\n<p>Also, you can check with <b>sudo update-alternatives &#8211;config java<\/b> and will see the <b>*<\/b>.<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">root@host:~# sudo update-alternatives --config java\nThere are 2 choices for the alternative java (providing \/usr\/bin\/java).\n\n  Selection    Path                                         Priority   Status\n------------------------------------------------------------\n  0            \/usr\/lib\/jvm\/jdk-21-oracle-x64\/bin\/java       352337920 auto mode\n  1            \/usr\/lib\/jvm\/java-21-openjdk-amd64\/bin\/java   2111      manual mode\n<b>* 2            \/usr\/lib\/jvm\/jdk-21-oracle-x64\/bin\/java       352337920 manual mode<\/b>\n\nPress <enter> to keep the current choice[*], or type selection number:\n<\/enter><\/pre>\n\n\n\n<p>Now, you can see the <b>*<\/b> is on the second option for Java Oracle 21.<\/p>\n\n\n\n<p>The main difference between Java Oracle and Java OpenJDK is that Java Oracle is paid and requires a license, or you can use it for non-commercial use. Java OpenJDK is open source and free to use but has fewer commercial features, unlike Java Oracle.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"You-successfully-installed-Java-21-on-Ubuntu-2404\"><\/span>You successfully installed Java 21 on Ubuntu 24.04<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Congratulations!<\/p>\n\n\n\n<p>Of course, you do not have to install it yourself. Just sign up for one of our <a href=\"https:\/\/www.rosehosting.com\/nvme-hosting\/\" target=\"_blank\" rel=\"noreferrer noopener\">NVMe VPS plans<\/a> and submit a support ticket. Our admins are available 24\/7 and will help you with installing Java 21 OpenJDK or Oracle Java.<\/p>\n\n\n\n<p>If you liked this post on how to install Java 21 on Ubuntu 24.04, please share it with your friends on social networks or leave a reply below. Thanks.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Java is a high-class object-oriented programming language that lets programmers or administrators run everywhere without recompiling. Java code is compiled &#8230; <\/p>\n<p class=\"read-more-container\"><a title=\"How to Install Java 21 on Ubuntu 24.04\" class=\"read-more button\" href=\"https:\/\/www.rosehosting.com\/blog\/how-to-install-java-21-on-ubuntu-24-04\/#more-48283\" aria-label=\"Read more about How to Install Java 21 on Ubuntu 24.04\">Read More<\/a><\/p>\n","protected":false},"author":4,"featured_media":48393,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1698],"tags":[1603,77,2140,27,59,2136],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>How to Install Java 21 on Ubuntu 24.04 - RoseHosting<\/title>\n<meta name=\"description\" content=\"Learn how to install Java 21 on Ubuntu 24.04 using our easy-to-follow step-by-step guide, or have one of our Linux admins do it for you.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.rosehosting.com\/blog\/how-to-install-java-21-on-ubuntu-24-04\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How to Install Java 21 on Ubuntu 24.04 - 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