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====== Install/Verify Java (Windows) ======

You will need Java installed if you want to:

  * Install a Fabric server. [[player:tutorials:server:windows|Windows]] and [[player:tutorials:install_server|Linux]] guides available
  * Run Minecraft in MultiMC or Prism Launcher
  * Run Technic Launcher
  * Change the default "JAVA EXECUTABLE" to other than the bundled Java runtime in a Minecraft Launcher "Installation"

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====== For Minecraft 1.17-1.20.4 we recommended using Java 17. ======
====== For Minecraft 1.20.5 and higher we recommend using Java 21. ======
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===== Video Tutorial =====
See the video tutorial by Kennas [[https://youtu.be/5JREP_8XgbE|here]] or click the image below:

[[https://youtu.be/5JREP_8XgbE|{{:player:tutorials:java:windows:yt01.jpg?direct|YouTube}}]]

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===== STEP 1: Verify if Java is already installed =====

Open the Run dialog by using the Windows+R hotkey. Enter ''cmd'' in the textbox and click ''OK'' This will open a command window.

{{:player:tutorials:java:windows:01.jpg?direct|}}

In the command window type ''java -version'' and press ''Enter''

{{:player:tutorials:java:windows:02.jpg?direct|}}

If Java is already installed you will see something like this:

{{:player:tutorials:java:windows:03.jpg?direct|}}


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===== STEP 2: Uninstall previous Java versions =====

If you already have Java installed and you want to update/replace it, you may want to uninstall any Java version(s) installed in your system using the Operating System normal procedure for uninstalling programs.


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===== STEP 3: Install Java =====

Download the Java 21 installer from [[https://adoptium.net/temurin/releases/?version=21|here]].


Choose the ''JDK .msi'':

{{:player:tutorials:java:download_java_re_.msi.png|}}

Open the JAVA installer you just downloaded:

{{:player:tutorials:java:windows:06a.jpg?direct|}}

When installing Java, change the way features will be installed:

{{:player:tutorials:java:windows:07.jpg?direct|}}

Set the following features to "Entire feature will be installed on local hard drive":

  * Set JAVA_HOME variable
  * JavaSoft (Oracle) registry keys

{{:player:tutorials:java:windows:08.jpg?direct|}}

Finish the installation, then go back to **[[player:tutorials:java:windows#step_1verify_if_java_is_already_installed|STEP 1]]** to verify that Java was installed correctly.