{"id":14132,"date":"2025-05-10T09:32:00","date_gmt":"2025-05-10T09:32:00","guid":{"rendered":"https:\/\/greenwebpage.com\/community\/?p=14132"},"modified":"2025-05-10T09:32:04","modified_gmt":"2025-05-10T09:32:04","slug":"how-to-install-java-on-debian-12","status":"publish","type":"post","link":"https:\/\/greenwebpage.com\/community\/how-to-install-java-on-debian-12\/","title":{"rendered":"How to Install Java on Debian 12: Using Apt and Deb"},"content":{"rendered":"\n<p>Java is an open-source programming language that is recognized worldwide for its use in developing web applications, mobile applications, and even games. Java is well-known for its robust features including being object-oriented, security, scalability, and others. Furthermore, Java is known for its multi-platform functionality and can be installed and used on several Operating systems, such as Linux, Windows, and Mac OS.<\/p>\n\n\n\n<p>Debian 12 represents the fan\u2019s latest release and can be downloaded from Debian\u2019s official page. We can install Java on Debian 12 and take advantage of these features. For this reason, several package managers such as apt, .deb and others can be used.<\/p>\n\n\n\n<p><strong>Table of Contents<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"#How-to-Install-Java-on-Debian-12\">How to Install Java on Debian 12<\/a>\n<ul class=\"wp-block-list\">\n<li><a href=\"#Method-1:-Installing-Java-on-Debian-12-Using-Apt\">Method 1: Using Apt<\/a><\/li>\n\n\n\n<li><a href=\"#Method-2:-Installing-Java-on-Debian-12-Using-Deb\">Method 2: Using Deb<\/a><\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><a href=\"#Switching-Default-Java-Version-on-Debian-12\">Switching Default Java Version on Debian 12<\/a><\/li>\n\n\n\n<li><a href=\"#Setting-JAVA_HOME-Environment-Variable-on-Debian-12\">Setting JAVA_HOME Environment Variable on Debian 12<\/a><\/li>\n\n\n\n<li><a href=\"#How-to-Uninstall-Java-From-Debian-12\">How to Uninstall Java From Debian 12<\/a>\n<ul class=\"wp-block-list\">\n<li><a href=\"#Method-1:-Uninstalling-Java-From-Debian-12-Using-Apt\">Method 1: Using Apt<\/a><\/li>\n\n\n\n<li><a href=\"#Method-2:-Uninstalling-Java-From-Debian-12-Using-Deb\">Method 2: Using Deb<\/a><\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><a href=\"#Final-Thoughts\">Final Thoughts<\/a><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"How-to-Install-Java-on-Debian-12\"><a id=\"post-14132-_eggwt4bls4js\"><\/a>How to Install Java on Debian 12<\/h2>\n\n\n\n<p>Installation of Java on Debian 12 can be done using the \u201cApt\u201d package manager and \u201cDeb\u201d package. For now, we will focus on the apt package manager as the point of starting.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"Method-1:-Installing-Java-on-Debian-12-Using-Apt\"><a id=\"post-14132-_oqy4qqz8200\"><\/a>Method 1: Installing Java on Debian 12 Using Apt<\/h3>\n\n\n\n<p>Java may be installed on Debian 12 using either JDK or JRE. Apt is an easy command-line utility for installing default or specific versions of Java. Although JDK and JRE have the same purpose for running Java programs, it is recommended that you install JDK on Debian because it offers additional functionalities for both executing and developing Java software.<\/p>\n\n\n\n<p>For Java installation using Apt on Debian 12, follow the simple steps outlined below:<\/p>\n\n\n\n<p><strong>Step 1: Update and Upgrade System Repositories<\/strong><\/p>\n\n\n\n<p>In order to install Java, the command below needs to be executed first in order to update and upgrade the repository.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\n<p>sudo apt update &amp;&amp; sudo apt upgrade<\/p>\n<\/th><\/tr><\/thead><\/table><\/figure>\n\n\n\n<p>Next, any outdated packages are scanned. As the repositories are updated and upgraded on the system, we can now proceed to step two.<\/p>\n\n\n\n<p><strong>Step 2: Check Available Java Versions<\/strong><\/p>\n\n\n\n<p>To list all the available versions of Java that can be installed on the system, run the command below:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\n<p>javac &#8211;version<\/p>\n<\/th><\/tr><\/thead><\/table><\/figure>\n\n\n\n<figure class=\"wp-block-image\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1078\" height=\"132\" src=\"http:\/\/greenwebpage.com\/community\/wp-content\/uploads\/2025\/05\/word-image-14132-2.png\" alt=\"javac --version\" class=\"wp-image-14133\" srcset=\"https:\/\/greenwebpage.com\/community\/wp-content\/uploads\/2025\/05\/word-image-14132-2.png 1078w, https:\/\/greenwebpage.com\/community\/wp-content\/uploads\/2025\/05\/word-image-14132-2-300x37.png 300w, https:\/\/greenwebpage.com\/community\/wp-content\/uploads\/2025\/05\/word-image-14132-2-1024x125.png 1024w, https:\/\/greenwebpage.com\/community\/wp-content\/uploads\/2025\/05\/word-image-14132-2-768x94.png 768w\" sizes=\"(max-width: 1078px) 100vw, 1078px\" \/><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<p>The snippet of output indicates that Java is not installed on my machine but still presents a range of versions that can be added.<\/p>\n\n\n\n<p>You can select the Java version that you need and run the respective command that will configure it on your computer.<\/p>\n\n\n\n<p><strong>Step 3: Install Java Using Apt<\/strong><\/p>\n\n\n\n<p>Choose the version of Java you would like to install from the available options and run the command below to install it on your Debian 12:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\n<p>sudo apt install default-jdk -y<\/p>\n<\/th><\/tr><\/thead><\/table><\/figure>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" width=\"1147\" height=\"569\" src=\"http:\/\/greenwebpage.com\/community\/wp-content\/uploads\/2025\/05\/word-image-14132-3.png\" alt=\"sudo apt install default-jdk -y\" class=\"wp-image-14134\" srcset=\"https:\/\/greenwebpage.com\/community\/wp-content\/uploads\/2025\/05\/word-image-14132-3.png 1147w, https:\/\/greenwebpage.com\/community\/wp-content\/uploads\/2025\/05\/word-image-14132-3-300x149.png 300w, https:\/\/greenwebpage.com\/community\/wp-content\/uploads\/2025\/05\/word-image-14132-3-1024x508.png 1024w, https:\/\/greenwebpage.com\/community\/wp-content\/uploads\/2025\/05\/word-image-14132-3-768x381.png 768w\" sizes=\"(max-width: 1147px) 100vw, 1147px\" \/><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<p>The command prompt shows that the JDK is installed, which will also be reflected on the default screenshot.<\/p>\n\n\n\n<p>Below is an example of how you can change \u201cdefault-jdk\u201d to any specific version to install other versions.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\n<p>sudo apt install java_version<\/p>\n<\/th><\/tr><\/thead><\/table><\/figure>\n\n\n\n<p><strong>Step 4: Verify Java Installation<\/strong><\/p>\n\n\n\n<p>To check that Java is installed on your Debian 12 machine, use the command below that checks which version is available on your system.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\n<p>java &#8211;version<\/p>\n<\/th><\/tr><\/thead><\/table><\/figure>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" width=\"1126\" height=\"197\" src=\"http:\/\/greenwebpage.com\/community\/wp-content\/uploads\/2025\/05\/word-image-14132-4.png\" alt=\"java --version\" class=\"wp-image-14135\" srcset=\"https:\/\/greenwebpage.com\/community\/wp-content\/uploads\/2025\/05\/word-image-14132-4.png 1126w, https:\/\/greenwebpage.com\/community\/wp-content\/uploads\/2025\/05\/word-image-14132-4-300x52.png 300w, https:\/\/greenwebpage.com\/community\/wp-content\/uploads\/2025\/05\/word-image-14132-4-1024x179.png 1024w, https:\/\/greenwebpage.com\/community\/wp-content\/uploads\/2025\/05\/word-image-14132-4-768x134.png 768w\" sizes=\"(max-width: 1126px) 100vw, 1126px\" \/><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<p>The result indicates that our Debian 12 now has \u201copenjdk 21.0.3\u201d Java installed.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"Method-2:-Installing-Java-on-Debian-12-Using-Deb\"><a id=\"post-14132-_blqcwolb7v21\"><\/a>Method 2: Installing Java on Debian 12 Using Deb<\/h3>\n\n\n\n<p>We can utilize the command wget for downloading the deb package of Java and use the apt command for its installation. To make things simple, follow the sequential steps listed below:<\/p>\n\n\n\n<p><strong>Step 1: Download the Deb Package<\/strong><\/p>\n\n\n\n<p>Wget is a CLI tool that downloads documents from the internet. Run the command below in the terminal to get the Java deb package from the Oracle Website:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\n<p>sudo wget https:\/\/download.oracle.com\/java\/21\/latest\/jdk-21_linux-x64_bin.deb<\/p>\n<\/th><\/tr><\/thead><\/table><\/figure>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1146\" height=\"441\" src=\"http:\/\/greenwebpage.com\/community\/wp-content\/uploads\/2025\/05\/word-image-14132-5.png\" alt=\"sudo wget https:\/\/download.oracle.com\/java\/21\/latest\/jdk-21_linux-x64_bin.deb\" class=\"wp-image-14136\" srcset=\"https:\/\/greenwebpage.com\/community\/wp-content\/uploads\/2025\/05\/word-image-14132-5.png 1146w, https:\/\/greenwebpage.com\/community\/wp-content\/uploads\/2025\/05\/word-image-14132-5-300x115.png 300w, https:\/\/greenwebpage.com\/community\/wp-content\/uploads\/2025\/05\/word-image-14132-5-1024x394.png 1024w, https:\/\/greenwebpage.com\/community\/wp-content\/uploads\/2025\/05\/word-image-14132-5-768x296.png 768w\" sizes=\"(max-width: 1146px) 100vw, 1146px\" \/><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<p><strong>Step 2: Install Java Using Deb<\/strong><\/p>\n\n\n\n<p>After that, utilize the below command line for installing Java through the deb package.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\n<p>sudo apt install .\/jdk-21_linux-x64_bin.deb<\/p>\n<\/th><\/tr><\/thead><\/table><\/figure>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1137\" height=\"531\" src=\"http:\/\/greenwebpage.com\/community\/wp-content\/uploads\/2025\/05\/word-image-14132-6.png\" alt=\"sudo apt install .\/jdk-21_linux-x64_bin.deb\" class=\"wp-image-14137\" srcset=\"https:\/\/greenwebpage.com\/community\/wp-content\/uploads\/2025\/05\/word-image-14132-6.png 1137w, https:\/\/greenwebpage.com\/community\/wp-content\/uploads\/2025\/05\/word-image-14132-6-300x140.png 300w, https:\/\/greenwebpage.com\/community\/wp-content\/uploads\/2025\/05\/word-image-14132-6-1024x478.png 1024w, https:\/\/greenwebpage.com\/community\/wp-content\/uploads\/2025\/05\/word-image-14132-6-768x359.png 768w\" sizes=\"(max-width: 1137px) 100vw, 1137px\" \/><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<p><strong>Step 3: Confirm Java Installation<\/strong><\/p>\n\n\n\n<p>Now, you can enter the command required to check that Java has been installed on Debian 12.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\n<p>java &#8211;version<\/p>\n<\/th><\/tr><\/thead><\/table><\/figure>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1140\" height=\"208\" src=\"http:\/\/greenwebpage.com\/community\/wp-content\/uploads\/2025\/05\/word-image-14132-7.png\" alt=\"java --version\" class=\"wp-image-14138\" srcset=\"https:\/\/greenwebpage.com\/community\/wp-content\/uploads\/2025\/05\/word-image-14132-7.png 1140w, https:\/\/greenwebpage.com\/community\/wp-content\/uploads\/2025\/05\/word-image-14132-7-300x55.png 300w, https:\/\/greenwebpage.com\/community\/wp-content\/uploads\/2025\/05\/word-image-14132-7-1024x187.png 1024w, https:\/\/greenwebpage.com\/community\/wp-content\/uploads\/2025\/05\/word-image-14132-7-768x140.png 768w\" sizes=\"(max-width: 1140px) 100vw, 1140px\" \/><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"Switching-Default-Java-Version-on-Debian-12\"><a id=\"post-14132-_803auuu15b9l\"><\/a>Switching Default Java Version on Debian 12<\/h2>\n\n\n\n<p>In case one is running multiple Java versions, one can change them with the specified command.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\n<p>sudo update-alternatives &#8211;config java<\/p>\n<\/th><\/tr><\/thead><\/table><\/figure>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1142\" height=\"388\" src=\"http:\/\/greenwebpage.com\/community\/wp-content\/uploads\/2025\/05\/word-image-14132-8.png\" alt=\"sudo update-alternatives --config java\" class=\"wp-image-14139\" srcset=\"https:\/\/greenwebpage.com\/community\/wp-content\/uploads\/2025\/05\/word-image-14132-8.png 1142w, https:\/\/greenwebpage.com\/community\/wp-content\/uploads\/2025\/05\/word-image-14132-8-300x102.png 300w, https:\/\/greenwebpage.com\/community\/wp-content\/uploads\/2025\/05\/word-image-14132-8-1024x348.png 1024w, https:\/\/greenwebpage.com\/community\/wp-content\/uploads\/2025\/05\/word-image-14132-8-768x261.png 768w\" sizes=\"(max-width: 1142px) 100vw, 1142px\" \/><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<p>One can either press &#8220;<strong>Enter<\/strong>&#8221; to keep the default Java version as is or change one by entering a selection number corresponding to the desired version.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"Setting-JAVA_HOME-Environment-Variable-on-Debian-12\"><a id=\"post-14132-_iwdehp43q514\"><\/a>Setting JAVA_HOME Environment Variable on Debian 12<\/h2>\n\n\n\n<p>If you wish to change the JAVA_HOME path variable on Debian, you may do so by editing the <strong>\/etc\/environmen<\/strong>t file using <strong>nano<\/strong>. You can open it by entering the command below.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\n<p>sudo nano \/etc\/environment<\/p>\n<\/th><\/tr><\/thead><\/table><\/figure>\n\n\n\n<p>Then, as seen in the example below, change the variable definition in the file to the path for the chosen version of Java you would like to use.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\n<p>JAVA_HOME=&#8221;\/usr\/lib\/jvm\/java-21-openjdk-amd64\/bin\/java&#8221;<\/p>\n<\/th><\/tr><\/thead><\/table><\/figure>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1120\" height=\"517\" src=\"http:\/\/greenwebpage.com\/community\/wp-content\/uploads\/2025\/05\/word-image-14132-9.png\" alt=\"JAVA_HOME=&quot;\/usr\/lib\/jvm\/java-21-openjdk-amd64\/bin\/java&quot;\" class=\"wp-image-14140\" srcset=\"https:\/\/greenwebpage.com\/community\/wp-content\/uploads\/2025\/05\/word-image-14132-9.png 1120w, https:\/\/greenwebpage.com\/community\/wp-content\/uploads\/2025\/05\/word-image-14132-9-300x138.png 300w, https:\/\/greenwebpage.com\/community\/wp-content\/uploads\/2025\/05\/word-image-14132-9-1024x473.png 1024w, https:\/\/greenwebpage.com\/community\/wp-content\/uploads\/2025\/05\/word-image-14132-9-768x355.png 768w\" sizes=\"(max-width: 1120px) 100vw, 1120px\" \/><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<p>In the nano editor, hit &#8220;<strong>CTRL+S<\/strong>&#8221; as well as &#8220;<strong>CTRL+X<\/strong>&#8221; to save the line and exit the interface.<\/p>\n\n\n\n<p>To apply the newly defined <strong>JAVA_HOME <\/strong>variable for the active session, use the command below to reload the <strong>\/etc\/environment <\/strong>file.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\n<p>source \/etc\/environment<\/p>\n<\/th><\/tr><\/thead><\/table><\/figure>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1123\" height=\"112\" src=\"http:\/\/greenwebpage.com\/community\/wp-content\/uploads\/2025\/05\/word-image-14132-10.png\" alt=\"source \/etc\/environment\" class=\"wp-image-14141\" srcset=\"https:\/\/greenwebpage.com\/community\/wp-content\/uploads\/2025\/05\/word-image-14132-10.png 1123w, https:\/\/greenwebpage.com\/community\/wp-content\/uploads\/2025\/05\/word-image-14132-10-300x30.png 300w, https:\/\/greenwebpage.com\/community\/wp-content\/uploads\/2025\/05\/word-image-14132-10-1024x102.png 1024w, https:\/\/greenwebpage.com\/community\/wp-content\/uploads\/2025\/05\/word-image-14132-10-768x77.png 768w\" sizes=\"(max-width: 1123px) 100vw, 1123px\" \/><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<p>Run the command below to check if the <strong>JAVA_HOME <\/strong>variable is properly defined.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\n<p>echo $JAVA_HOME<\/p>\n<\/th><\/tr><\/thead><\/table><\/figure>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1114\" height=\"136\" src=\"http:\/\/greenwebpage.com\/community\/wp-content\/uploads\/2025\/05\/word-image-14132-11.png\" alt=\"echo $JAVA_HOME\" class=\"wp-image-14142\" srcset=\"https:\/\/greenwebpage.com\/community\/wp-content\/uploads\/2025\/05\/word-image-14132-11.png 1114w, https:\/\/greenwebpage.com\/community\/wp-content\/uploads\/2025\/05\/word-image-14132-11-300x37.png 300w, https:\/\/greenwebpage.com\/community\/wp-content\/uploads\/2025\/05\/word-image-14132-11-1024x125.png 1024w, https:\/\/greenwebpage.com\/community\/wp-content\/uploads\/2025\/05\/word-image-14132-11-768x94.png 768w\" sizes=\"(max-width: 1114px) 100vw, 1114px\" \/><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"How-to-Uninstall-Java-From-Debian-12\"><a id=\"post-14132-_1kzzblw4mwqh\"><\/a>How to Uninstall Java From Debian 12<\/h2>\n\n\n\n<p>In the event that Java is deemed unnecessary, one can remove it to recover hard drive space. In any case, the manner in which Java is installed determines how it can be uninstalled.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"Method-1:-Uninstalling-Java-From-Debian-12-Using-Apt\"><a id=\"post-14132-_gvqx4sbw3cvq\"><\/a>Method 1: Uninstalling Java From Debian 12 Using Apt<\/h3>\n\n\n\n<p>If Java was added via Apt, it can also be removed from Debian 12 using the following command:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\n<p>sudo apt autoremove java* -y<\/p>\n<\/th><\/tr><\/thead><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"Method-2:-Uninstalling-Java-From-Debian-12-Using-Deb\"><a id=\"post-14132-_gx1z9ld7buho\"><\/a>Method 2: Uninstalling Java From Debian 12 Using Deb<\/h3>\n\n\n\n<p>If Java is installed on Debian using the deb package, it can be removed by executing:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\n<p>sudo apt autoremove jdk-21 -y<\/p>\n<\/th><\/tr><\/thead><\/table><\/figure>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1137\" height=\"404\" src=\"http:\/\/greenwebpage.com\/community\/wp-content\/uploads\/2025\/05\/word-image-14132-12.png\" alt=\"sudo apt autoremove jdk-21 -y\" class=\"wp-image-14143\" srcset=\"https:\/\/greenwebpage.com\/community\/wp-content\/uploads\/2025\/05\/word-image-14132-12.png 1137w, https:\/\/greenwebpage.com\/community\/wp-content\/uploads\/2025\/05\/word-image-14132-12-300x107.png 300w, https:\/\/greenwebpage.com\/community\/wp-content\/uploads\/2025\/05\/word-image-14132-12-1024x364.png 1024w, https:\/\/greenwebpage.com\/community\/wp-content\/uploads\/2025\/05\/word-image-14132-12-768x273.png 768w\" sizes=\"(max-width: 1137px) 100vw, 1137px\" \/><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<p>This sums up the installation and uninstallation of Java on Debian 12.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"Final-Thoughts\"><a id=\"post-14132-_ke20k0abp09b\"><\/a>Final Thoughts<\/h2>\n\n\n\n<p>Using both &#8220;apt&#8221; and &#8220;deb&#8221;, Java can be installed on Debian 12. As noted, all methods allow the installation of Java on Debian 12. Still, each installation technique comes with advantages and disadvantages. For example, once Java is added through apt or deb, multiple versions can be interchanged swiftly. This guide has covered all possible methods to install Java on Debian 12.<\/p>\n\n\n\t\t\t\t\t\t\t<h3 style=\"margin-bottom:20px;display:block;width:100%;margin-top:10px\">Frequently Asked Questions <\/h3>\r\n\t\t\t\t\t\t<style>\r\n\t\t\t\t<style>\r\n#wpsm_accordion_14151 .wpsm_panel-heading{\r\n\tpadding:0px !important;\r\n}\r\n#wpsm_accordion_14151 .wpsm_panel-title {\r\n\tmargin:0px !important; \r\n\ttext-transform:none !important;\r\n\tline-height: 1 !important;\r\n}\r\n#wpsm_accordion_14151 .wpsm_panel-title a{\r\n\ttext-decoration:none;\r\n\toverflow:hidden;\r\n\tdisplay:block;\r\n\tpadding:0px;\r\n\tfont-size: 18px !important;\r\n\tfont-family: Open Sans !important;\r\n\tcolor:#000000 !important;\r\n\tborder-bottom:0px !important;\r\n}\r\n\r\n#wpsm_accordion_14151 .wpsm_panel-title a:focus {\r\noutline: 0px !important;\r\n}\r\n\r\n#wpsm_accordion_14151 .wpsm_panel-title a:hover, #wpsm_accordion_14151 .wpsm_panel-title a:focus {\r\n\tcolor:#000000 !important;\r\n}\r\n#wpsm_accordion_14151 .acc-a{\r\n\tcolor: #000000 !important;\r\n\tbackground-color:#e8e8e8 !important;\r\n\tborder-color: #ddd;\r\n}\r\n#wpsm_accordion_14151 .wpsm_panel-default > .wpsm_panel-heading{\r\n\tcolor: #000000 !important;\r\n\tbackground-color: #e8e8e8 !important;\r\n\tborder-color: #e8e8e8 !important;\r\n\tborder-top-left-radius: 0px;\r\n\tborder-top-right-radius: 0px;\r\n}\r\n#wpsm_accordion_14151 .wpsm_panel-default {\r\n\t\tborder:1px solid transparent !important;\r\n\t}\r\n#wpsm_accordion_14151 {\r\n\tmargin-bottom: 20px;\r\n\toverflow: hidden;\r\n\tfloat: none;\r\n\twidth: 100%;\r\n\tdisplay: block;\r\n}\r\n#wpsm_accordion_14151 .ac_title_class{\r\n\tdisplay: block;\r\n\tpadding-top: 12px;\r\n\tpadding-bottom: 12px;\r\n\tpadding-left: 15px;\r\n\tpadding-right: 15px;\r\n}\r\n#wpsm_accordion_14151  .wpsm_panel {\r\n\toverflow:hidden;\r\n\t-webkit-box-shadow: 0 0px 0px rgba(0, 0, 0, .05);\r\n\tbox-shadow: 0 0px 0px rgba(0, 0, 0, .05);\r\n\t\tborder-radius: 4px;\r\n\t}\r\n#wpsm_accordion_14151  .wpsm_panel + .wpsm_panel {\r\n\t\tmargin-top: 5px;\r\n\t}\r\n#wpsm_accordion_14151  .wpsm_panel-body{\r\n\tbackground-color:#ffffff !important;\r\n\tcolor:#000000 !important;\r\n\tborder-top-color: #e8e8e8 !important;\r\n\tfont-size:16px !important;\r\n\tfont-family: Open Sans !important;\r\n\toverflow: hidden;\r\n\t\tborder: 2px solid #e8e8e8 !important;\r\n\t}\r\n\r\n#wpsm_accordion_14151 .ac_open_cl_icon{\r\n\tbackground-color:#e8e8e8 !important;\r\n\tcolor: #000000 !important;\r\n\tfloat:right !important;\r\n\tpadding-top: 12px !important;\r\n\tpadding-bottom: 12px !important;\r\n\tline-height: 1.0 !important;\r\n\tpadding-left: 15px !important;\r\n\tpadding-right: 15px !important;\r\n\tdisplay: inline-block !important;\r\n}\r\n\r\n\t\t\t\r\n\t\t\t<\/style>\t\r\n\t\t\t<\/style>\r\n\t\t\t<div class=\"wpsm_panel-group\" id=\"wpsm_accordion_14151\" >\r\n\t\t\t\t\t\t\t\t\r\n\t\t\t\t\t<!-- Inner panel Start -->\r\n\t\t\t\t\t<div class=\"wpsm_panel wpsm_panel-default\">\r\n\t\t\t\t\t\t<div class=\"wpsm_panel-heading\" role=\"tab\" >\r\n\t\t\t\t\t\t  <h4 class=\"wpsm_panel-title\">\r\n\t\t\t\t\t\t\t<a  class=\"\"  data-toggle=\"collapse\" data-parent=\"#wpsm_accordion_14151 \" href=\"javascript:void(0)\" data-target=\"#ac_14151_collapse1\" onclick=\"do_resize()\">\r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"ac_open_cl_icon fa fa-plus\"><\/span>\r\n\t\t\t\t\t\t\t\t\t\r\n\t\t\t\t\t\t\t\t \r\n\t\t\t\t\t\t\t\t<span class=\"ac_title_class\">\r\n\t\t\t\t\t\t\t\t\tHow do I install the default Java version on Debian 12?\t\t\t\t\t\t\t\t<\/span>\r\n\t\t\t\t\t\t\t<\/a>\r\n\t\t\t\t\t\t  <\/h4>\r\n\t\t\t\t\t\t<\/div>\r\n\t\t\t\t\t\t<div id=\"ac_14151_collapse1\" class=\"wpsm_panel-collapse collapse \"  >\r\n\t\t\t\t\t\t  <div class=\"wpsm_panel-body\">\r\n\t\t\t\t\t\t\tRun <code>sudo apt update<\/code> followed by <code>sudo apt install default-jdk<\/code> to install the default Java Development Kit available in Debian\u2019s repositories.\t\t\t\t\t\t  <\/div>\r\n\t\t\t\t\t\t<\/div>\r\n\t\t\t\t\t<\/div>\r\n\t\t\t\t\t<!-- Inner panel End -->\r\n\t\t\t\t\t\r\n\t\t\t\t\t\t\t\t\r\n\t\t\t\t\t<!-- Inner panel Start -->\r\n\t\t\t\t\t<div class=\"wpsm_panel wpsm_panel-default\">\r\n\t\t\t\t\t\t<div class=\"wpsm_panel-heading\" role=\"tab\" >\r\n\t\t\t\t\t\t  <h4 class=\"wpsm_panel-title\">\r\n\t\t\t\t\t\t\t<a  class=\"collapsed\"  data-toggle=\"collapse\" data-parent=\"#wpsm_accordion_14151 \" href=\"javascript:void(0)\" data-target=\"#ac_14151_collapse2\" onclick=\"do_resize()\">\r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"ac_open_cl_icon fa fa-plus\"><\/span>\r\n\t\t\t\t\t\t\t\t\t\r\n\t\t\t\t\t\t\t\t \r\n\t\t\t\t\t\t\t\t<span class=\"ac_title_class\">\r\n\t\t\t\t\t\t\t\t\tHow can I check if Java is already installed?\t\t\t\t\t\t\t\t<\/span>\r\n\t\t\t\t\t\t\t<\/a>\r\n\t\t\t\t\t\t  <\/h4>\r\n\t\t\t\t\t\t<\/div>\r\n\t\t\t\t\t\t<div id=\"ac_14151_collapse2\" class=\"wpsm_panel-collapse collapse \"  >\r\n\t\t\t\t\t\t  <div class=\"wpsm_panel-body\">\r\n\t\t\t\t\t\t\tUse the command <code>java --version<\/code> or <code>javac --version<\/code> to see if Java and the compiler are already installed on your system.\t\t\t\t\t\t  <\/div>\r\n\t\t\t\t\t\t<\/div>\r\n\t\t\t\t\t<\/div>\r\n\t\t\t\t\t<!-- Inner panel End -->\r\n\t\t\t\t\t\r\n\t\t\t\t\t\t\t\t\r\n\t\t\t\t\t<!-- Inner panel Start -->\r\n\t\t\t\t\t<div class=\"wpsm_panel wpsm_panel-default\">\r\n\t\t\t\t\t\t<div class=\"wpsm_panel-heading\" role=\"tab\" >\r\n\t\t\t\t\t\t  <h4 class=\"wpsm_panel-title\">\r\n\t\t\t\t\t\t\t<a  class=\"collapsed\"  data-toggle=\"collapse\" data-parent=\"#wpsm_accordion_14151 \" href=\"javascript:void(0)\" data-target=\"#ac_14151_collapse3\" onclick=\"do_resize()\">\r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"ac_open_cl_icon fa fa-plus\"><\/span>\r\n\t\t\t\t\t\t\t\t\t\r\n\t\t\t\t\t\t\t\t \r\n\t\t\t\t\t\t\t\t<span class=\"ac_title_class\">\r\n\t\t\t\t\t\t\t\t\tHow do I install a specific Java version like OpenJDK 17?\t\t\t\t\t\t\t\t<\/span>\r\n\t\t\t\t\t\t\t<\/a>\r\n\t\t\t\t\t\t  <\/h4>\r\n\t\t\t\t\t\t<\/div>\r\n\t\t\t\t\t\t<div id=\"ac_14151_collapse3\" class=\"wpsm_panel-collapse collapse \"  >\r\n\t\t\t\t\t\t  <div class=\"wpsm_panel-body\">\r\n\t\t\t\t\t\t\tRun <code>sudo apt install openjdk-17-jdk<\/code> to install OpenJDK 17 specifically.\t\t\t\t\t\t  <\/div>\r\n\t\t\t\t\t\t<\/div>\r\n\t\t\t\t\t<\/div>\r\n\t\t\t\t\t<!-- Inner panel End -->\r\n\t\t\t\t\t\r\n\t\t\t\t\t\t\t\t\r\n\t\t\t\t\t<!-- Inner panel Start -->\r\n\t\t\t\t\t<div class=\"wpsm_panel wpsm_panel-default\">\r\n\t\t\t\t\t\t<div class=\"wpsm_panel-heading\" role=\"tab\" >\r\n\t\t\t\t\t\t  <h4 class=\"wpsm_panel-title\">\r\n\t\t\t\t\t\t\t<a  class=\"collapsed\"  data-toggle=\"collapse\" data-parent=\"#wpsm_accordion_14151 \" href=\"javascript:void(0)\" data-target=\"#ac_14151_collapse4\" onclick=\"do_resize()\">\r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"ac_open_cl_icon fa fa-plus\"><\/span>\r\n\t\t\t\t\t\t\t\t\t\r\n\t\t\t\t\t\t\t\t \r\n\t\t\t\t\t\t\t\t<span class=\"ac_title_class\">\r\n\t\t\t\t\t\t\t\t\tCan I install multiple Java versions on Debian 12?\t\t\t\t\t\t\t\t<\/span>\r\n\t\t\t\t\t\t\t<\/a>\r\n\t\t\t\t\t\t  <\/h4>\r\n\t\t\t\t\t\t<\/div>\r\n\t\t\t\t\t\t<div id=\"ac_14151_collapse4\" class=\"wpsm_panel-collapse collapse \"  >\r\n\t\t\t\t\t\t  <div class=\"wpsm_panel-body\">\r\n\t\t\t\t\t\t\tYes, you can install multiple versions and switch between them using the <code>update-alternatives<\/code> tool.\t\t\t\t\t\t  <\/div>\r\n\t\t\t\t\t\t<\/div>\r\n\t\t\t\t\t<\/div>\r\n\t\t\t\t\t<!-- Inner panel End -->\r\n\t\t\t\t\t\r\n\t\t\t\t\t\t\t\t\r\n\t\t\t\t\t<!-- Inner panel Start -->\r\n\t\t\t\t\t<div class=\"wpsm_panel wpsm_panel-default\">\r\n\t\t\t\t\t\t<div class=\"wpsm_panel-heading\" role=\"tab\" >\r\n\t\t\t\t\t\t  <h4 class=\"wpsm_panel-title\">\r\n\t\t\t\t\t\t\t<a  class=\"collapsed\"  data-toggle=\"collapse\" data-parent=\"#wpsm_accordion_14151 \" href=\"javascript:void(0)\" data-target=\"#ac_14151_collapse5\" onclick=\"do_resize()\">\r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"ac_open_cl_icon fa fa-plus\"><\/span>\r\n\t\t\t\t\t\t\t\t\t\r\n\t\t\t\t\t\t\t\t \r\n\t\t\t\t\t\t\t\t<span class=\"ac_title_class\">\r\n\t\t\t\t\t\t\t\t\tHow do I set the default Java version?\t\t\t\t\t\t\t\t<\/span>\r\n\t\t\t\t\t\t\t<\/a>\r\n\t\t\t\t\t\t  <\/h4>\r\n\t\t\t\t\t\t<\/div>\r\n\t\t\t\t\t\t<div id=\"ac_14151_collapse5\" class=\"wpsm_panel-collapse collapse \"  >\r\n\t\t\t\t\t\t  <div class=\"wpsm_panel-body\">\r\n\t\t\t\t\t\t\tRun <code>sudo update-alternatives --config java<\/code> and choose the desired version from the list.\t\t\t\t\t\t  <\/div>\r\n\t\t\t\t\t\t<\/div>\r\n\t\t\t\t\t<\/div>\r\n\t\t\t\t\t<!-- Inner panel End -->\r\n\t\t\t\t\t\r\n\t\t\t\t\t\t\t<\/div>\r\n\t\t\t\r\n<script type=\"text\/javascript\">\r\n\t\r\n\t\tfunction do_resize(){\r\n\r\n\t\t\tvar width=jQuery( '.wpsm_panel .wpsm_panel-body iframe' ).width();\r\n\t\t\tvar height=jQuery( '.wpsm_panel .wpsm_panel-body iframe' ).height();\r\n\r\n\t\t\tvar toggleSize = true;\r\n\t\t\tjQuery('iframe').animate({\r\n\t\t\t    width: toggleSize ? width : 640,\r\n\t\t\t    height: toggleSize ? height : 360\r\n\t\t\t  }, 250);\r\n\r\n\t\t\t  toggleSize = !toggleSize;\r\n\t\t}\r\n\t\t\r\n<\/script>\t\n\n\n\n<p><\/p>\n\n    <div class=\"xs_social_share_widget xs_share_url after_content \t\tmain_content  wslu-style-1 wslu-share-box-shaped wslu-fill-colored wslu-none wslu-share-horizontal wslu-theme-font-no wslu-main_content\">\n\n\t\t\n        <ul>\n\t\t\t        <\/ul>\n    <\/div> \n","protected":false},"excerpt":{"rendered":"<p>Java is an open-source programming language that is recognized worldwide for its use in developing web applications, mobile applications, and even games. Java is well-known for its robust features including being object-oriented, security, scalability, and others. Furthermore, Java is known for its multi-platform functionality and can be installed and used on several Operating systems, such [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":14153,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[43],"tags":[297,257,801,802,350],"class_list":["post-14132","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tutorials","tag-debian-12","tag-java","tag-mobile-development","tag-programming-language","tag-web-development"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>How to Install Java on Debian 12: Using Apt and Deb<\/title>\n<meta name=\"description\" content=\"This tutorial walks you through steps to install Java on Debian 12 using both apt package manager and .deb.\" \/>\n<meta name=\"robots\" content=\"index, follow, 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