Jre java home path

How to Set JAVA_HOME for JDK & JRE: A Step-by-Step Guide

This article was co-authored by wikiHow staff writer, Nicole Levine, MFA. Nicole Levine is a Technology Writer and Editor for wikiHow. She has more than 20 years of experience creating technical documentation and leading support teams at major web hosting and software companies. Nicole also holds an MFA in Creative Writing from Portland State University and teaches composition, fiction-writing, and zine-making at various institutions.

This article has been viewed 323,351 times.

Are you seeing Java errors like «JAVA_HOME is not defined correctly?» or «JAVA_HOME is set to an invalid directory?» If you’ve recently installed the Java Development Kit (JDK) or the Java Runtime Environment (JRE), you’ll need to set your JAVA_HOME variables and configure the path so applications know where to find Java. This wikiHow article will show you the easiest ways to change or set the Java home path on Windows, macOS, and Linux.

• Before you can set JAVA_HOME, you’ll need the full path to your JDK or JRE installation.
• Once you set the JAVA_HOME environment variable, you can run the command echo $JAVA_HOME to see the new path.
• To set the Java home and path on Linux or macOS permanently (even after a reboot), add the environment variables to your .bashrc or .zshrc file.

Windows

• Open File Explorer, click This PC in the left panel, then navigate to C:\Program Files\Java. The directory you’re looking for should have the name of the JDK version, such as C:\Program Files\Java\jdk-19.
• If you installed the JRE instead of the JDK, you’ll have something like C:\Program Files\Java\jre1.8.0_351 instead.
• You can also open the command prompt and run the command wmic product where «Name like ‘%%Java%%'» get installlocation,Name . This will tell you the full path of the JDK, even if you haven’t yet set JAVA_HOME.

• Press the Windows key on your keyboard and type advanced system .
• Click View advanced system settings in the search results.

Click the Environment Variables button. You’ll see it at the bottom-right corner of the System Properties window.

• If you have multiple installations of the JDK and want to change JAVA_HOME to your new installation, select the current JAVA_HOME user variable and click Edit… instead.

• If you’re editing the current JAVA_HOME path, you’ll already have JAVA_HOME here. So, you can skip this step.

• If you’re adding a second path to JAVA_HOME, just type a semicolon (;) after the first path, then enter the second path.
• If you’re replacing an old JAVA_HOME path, just delete the current path and enter the new one.

• If you want other users on this PC to be able to access Java binaries from the command line, repeat this step for the «Path» variable under «System variables» as well.

• Click the New button at the top.
• Enter the full path to the JRE or JDK with \bin at the end. For example, C:\Program Files\Java\jdk-19\bin or C:\Program Files\Java\jre1.8.0_351\bin.
• Click OK.

• You won’t need to restart your computer for the changes to take effect, but you will need to relaunch any apps that were trying to access Java.
• Open a new command prompt window and run the command echo %JAVA_HOME% to display the new path to JAVA_HOME.
  • Make sure this is a new command prompt window. If you still have the same window open, the command will fail because it doesn’t have the new environment variables.

  macOS

  

  Open a Terminal window. To open Terminal, search for Terminal in Spotlight. Or, you can open Finder, click the Go menu, select Utilities, and choose the Terminal app.

  

  • If you have more than one Java installation and want to see the paths to all of them, use /usr/libexec/java_home -V instead.

  

  Copy the path and paste it somewhere handy. Highlight the path to the Java installation you want to use as JAVA_HOME, press Cmd + V to copy it, then paste it into a sticky note or text file.

  

  • Type cd ~ and press Return.
  • Type open .zshrc and press Return. This should open the file in a text editor.
  • If the file is not found, type echo > .zshrc and press Return. Then, run open .zshrc again.

  

  • export JAVA_HOME=/Library/Java/JavaVirtualMachines/jdk-17.0.1.jdk/Contents/Home
    • Replace /Library/Java/JavaVirtualMachines/jdk-17.0.1.jdk/Contents/Home with the full path to the /Contents/Home directory of your Java installation if it’s different.

    

    Type source .zshrc and press ⏎ Return . Once you’ve edited your profile, this command ensures that your environment variables will be updated for the current terminal window (and any other windows you open from now on).

    

    • If you had any other windows open that were attempting to find Java binaries, close and reopen them.
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    Linux

    

    

    • readlink -f `which javac`
    • If that doesn’t work, try running update-alternatives —list java .
    • If neither of these commands works, run whereis java , which will usually result in a symbolic link like /usr/bin/java.
      • Once you get the directory, find out where it links using ls -la /bin/java .
      • If that points you to another directory, e.g., /etc/alternatives/java, run ls -la /etc/alternatives/java .
      • At that point, you should see a much longer directory, which is actually the home to the Java binaries. For example, usr/lib/jvm/java-11-openjdk-arm64/bin/java . This is the directory you want.

      

      • echo «export JAVA_HOME=/usr/lib/jvm/java-11-openjdk-arm64» >> ~/.bashrc
      • echo «export PATH=$PATH:$JAVA_HOME/bin» >> ~/.bashrc

      

      Expert Q&A

      In Linux, you can set JAVA__HOME for all users by editing the global .bashrc, which is located at /etc/bash.bashrc. Just use echo and replace ~/.bashrc with /etc/bash.bashrc .

      

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      About This Article

      This article was co-authored by wikiHow staff writer, Nicole Levine, MFA. Nicole Levine is a Technology Writer and Editor for wikiHow. She has more than 20 years of experience creating technical documentation and leading support teams at major web hosting and software companies. Nicole also holds an MFA in Creative Writing from Portland State University and teaches composition, fiction-writing, and zine-making at various institutions. This article has been viewed 323,351 times.

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      Переменная окружения JAVA_HOME

      Во многих статьях в интернете, документации к инструментам для разработки на Java и в книгах зачастую упоминается JAVA_HOME. Что же такое JAVA_HOME?

      Что такое JAVA_HOME

      JAVA_HOME это переменная окружения, указывающая на директорию с установленным JDK (Java Development Kit, комплект разработчика Java). JAVA_HOME это соглашение, используемое во многих программах из экосистемы Java.

      Какие программы используют JAVA_HOME

      • Intellij IDEA, Eclipse, NetBeans
      • Apache Maven, Apache Ant, Gradle
      • Apache Tomcat
      • Jenkins

      Некоторые игры, написанные на Java (например, Minecraft), тоже могут требовать установленной переменной JAVA_HOME.

      Ошибки, связанные с JAVA_HOME

      Если переменная окружения JAVA_HOME не определена, некоторые программы могут выдавать следующие ошибки:

      • Переменная среды java_home не определена
      • Cannot determine a valid Java Home
      • JAVA_HOME is set to an invalid directory
      • JAVA_HOME is not defined correctly
      • JAVA_HOME environment variable is not set
      • JAVA_HOME command not found
      • JAVA_HOME not found in your environment
      • JAVA_HOME does not point to the JDK

      При появлении таких ошибок просто установите переменную JAVA_HOME

      Как установить переменную окружения JAVA_HOME в Windows

      Сперва вам нужно установить JDK или JRE.

      • Установите JDK, если вы занимаетесь разработкой программ на Java
      • Установите JRE, если вам нужно только запустить прикладную программу на Java

      После установки JDK либо JRE запишите путь установки, он понадобится.

      Теперь щёлкните правой кнопкой на «Мой компьютер» → «Свойства» → «Дополнительные параметры системы» → «Переменные среды…». В разделе «Системные переменные» нажмите кнопку «Создать…» и укажите следующие данные:

      Имя переменной	JAVA_HOME
      Значение переменной	Путь к директории JDK / JRE, например: C:\Java\jdk-11.0.6

      Сохраните изменения, кликнув «OK». Теперь выберите в списке переменную окружения Path и нажмите «Изменить…». В конце списка добавьте строчку со значением «%JAVA_HOME%\bin«

      

      

      Для проверки откройте консоль (Win+R, cmd) и укажите последовательно укажите две команды:

      Если вы правильно установили JDK/JRE и правильно установили переменные окружения, вы увидите вывод наподобие этого:

      

      Это будет служить результатом того, что переменная JAVA_HOME установлена правильно и Java работает из командной строки.

      Резюме

      В данной статье мы рассказали вам, что являет собой переменная окружения JAVA_HOME, где она используется и как её корректно указать.

      Источник

      How To Set Java, JRE and JDK Home Path and Environment Variables On Windows?

      

      Java is a very popular programming language which provides a different component in order to run, develop Java applications. JRE or Java Runtime Environment is used to run Java application. JDK or Java Development Kit is used to develop Java applications. In this tutorial, we will learn how to set up Java, JRE, and JDK operating system path variables in order to work properly.

      Locate JRE or JDK Path

      Before starting the configuration we have to locate the JRE or JDK path. JRE or JDK generally installed on the Program Files or Program Files(x86) directory under the Java directory like below.

      

      and under the Java directory the JDK is residing.

      

      Set Java HOME_PATH Environment Variable

      Now we have learned the path of the Java, JRE or JDK installation. We can set this path as Java HOME_PATH environment variable. We will open the computer properties with by running sysdm.cpl in the Run menu like below. We can also open it from the File Explorer -> Computer -> Right Click.

      

      In the system properties, we will navigate to the Advanced tab which provides the Environment Variables button like below.

      

      Below we can see the environment variables menu where we will create the JAVA_HOME system variable and set the path accordingly. We click to the New in order to create a new system variable.

      

      Here we will set the Variable Name as JAVA_HOME and the Variable Value the path or Java, JRE or JDK which is C:\Program Files\Java\jdk-12 in this example. Then we will click OK.

      

      Set JAVA Executable Path

      If we want to run java.exe or similar executables provided by JRE or JDK we have to add the path of Java in the Path variable like below. We select the system variable named Path and click to the Edit .

      

      Here we click to New which will add a new line to the existing values.

      

      Here we will set the bin folder path which is C:\Program Files\Java\jdk-12\bin in this example.

      

      Then we will click OK and OK in the environment variables screen which will save and activated new path configuration.

      Check Java Is Working

      We can check the new path configuration simply opening a new command line interface MS-DOS. Then just type java -version which will execute java.exe with the -version option. We can see the current java binary version by running it.

      

      3 thoughts on “How To Set Java, JRE and JDK Home Path and Environment Variables On Windows?”

      What is the point in setting the JAVA_HOME to the path to the jdk install folder path if you then edit the Path variable and add the full path to the jdk bin folder? Shouldn’t you make use of the JAVA_HOME variable and add %JAVA_HOME%\bin to the Path instead. Reply

      Источник