Java home path cmd

How to set JAVA_HOME in Windows 11/10

In Unix terminology, an Environment variable is a string that holds information such as drive name, pathname, filename, etc. JAVA_HOME is an environment variable which addresses to the directory where Java Runtime Environment or Java Development Kit is installed in the system. To be precise, say if you have installed Java in the path C:\Program Files\Java\jdk1.8.0_121 on your computer, then your Java_Home is C:\Program Files\Java\jdk1.8.0_121. Basically, JAVA_Home is simply an exemplary used by Java-based programs like Apache Tomcat and other app server tools to find where Java is placed in the system.

These third-party programs make use of the environment variables that point to the directory of JDK or JRE. In simple words, it makes easy for the programs to locate the directory executable like javac in the computer. If you are not using these third-party programs, then it may not be mandatory for users to set up JAVA_Home in your system. In this article, we will explain in detail how to set JAVA_HOME as the environment variable in Windows 10.

Setting JAVA_HOME in Windows 11/10

Set JAVA_HOME environment variable & update the system path

Download and install Java from the official site – java.com.

After installation, Go to Start menu and type Advanced system settings.

Click on View advanced system settings from the list to open System Properties.

Go to Advanced tab and click on Environment Variables button.

In the Environment Variable window, click on New button under the System variable.

In the Edit System Variable, give the Variable name as JAVA_HOME and Variable value as the path to your JDK directory.

Click on OK.

Now go back to the Environment Variable window and select Path under the System variable.

Click on Edit button to open Edit environment variable window.

Click on New button and type %JAVA_HOME%\bin.

Click OK to apply the changes.

Check JAVA_HOME configuration setup using CMD

To test your configuration, open Command prompt.

Type echo %JAVA_HOME% and hit Enter. This should print the directory of the JDK which the JAVA_HOME is pointing. Instead, if you see a space, it means you have failed in setting up environment variable.

Next Type javac -version which should print the version of Java compiler.

If not it will print a message that the javac is not recognized as an internal or external command. This means the path variable is not set correctly.

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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.

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Setting the JAVA_HOME Variable in Windows

To install Confluence manually on Windows, you will need to set an environment variable to point Confluence to the your Java installation directory.

This information is only relevant if you’re installing Confluence manually on a Windows server. If you’re using the installer, you don’t need to do this.

In most cases you should set the JRE_HOME environment variable, but if it is not set, Confluence will use JAVA_HOME.

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Set the JAVA_HOME Variable

To set the JRE_HOME or JAVA_HOME variable:

Locate your Java installation directory

If you didn’t change the path during installation, it’ll be something like C:\Program Files\Eclipse Adoptium\jdk-11.0.17.8-hotspot\ or C:\Program Files\Java\jdk-17.0.4.1\ You can also type where java at the command prompt.

Do one of the following:
Windows 7 – Right click My Computer and select Properties >Advanced
Windows 8 – Go to Control Panel >System >Advanced System Settings
Windows 10 – Search for Environment Variables then select Edit the system environment variables

Click the Environment Variables button.

Under System Variables, click New.

In the Variable Name field, enter either:

• JAVA_HOME if you installed the JDK (Java Development Kit)
  or
• JRE_HOME if you installed the JRE (Java Runtime Environment)

In the Variable Value field, enter your JDK or JRE installation path.

Click OK and Apply Changes as prompted

You’ll need to close and re-open any command windows that were open before you made these changes, as there’s no way to reload environment variables from an active command prompt. If the changes don’t take effect after reopening the command window, restart Windows.

Set the JAVA_HOME variable via the command line

If you would prefer to set the JAVA_HOME (or JRE_HOME) variable via the command line:

1. Open Command Prompt (make sure you Run as administrator so you’re able to add a system environment variable).
2. Set the value of the environment variable to your JDK (or JRE) installation path as follows:

setx /m JAVA_HOME "C:\Program Files\Java\jdk11.0.17.8"

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How to set environment variables for Java using command line

Well, in this article I talked about the JVM, JRE and JDK, which are the cornerstones of the Java programming language. You develop Java applications by using tools like editors, IDEs and servers. These tools need to use the Java compiler ( javac ) and Java launcher ( java ) to compile and run Java applications, but these tools don’t know where the JRE or JDK is.

So, by setting up the environment variables, you tell your tools that:

“Hey, you can find the compiler and launcher here and there”.

The first thing you need to do after installing the JDK is creating an environment variable named JAVA_HOME and then update the PATH variable.

• JAVA_HOME : stores location of the JDK’s installation directory. When you install development tools, they will first check for the JAVA_HOME variable. If found, they will stick with it. If not, they may ask you to manually specify the location where JRE/JDK is installed.
• PATH : stores paths of directories where the operating system will look, to launch the requested programs quickly. For Java development, you should update this environment variable by adding an entry to the bin directory under JDK’s installation directory.

• JAVA_HOME = C:\Program Files\Java\jdk1.8.0
• PATH = PATH + C:\Program Files\Java\jdk1.8.0\bin

But that isn’t cool, because I’m about to show you how to do the same thing using command line prompt as shown below (Windows 7, 8 and 10):

setx JAVA_HOME "C:\Program Files\Java\jdk1.8.0" setx PATH "%PATH%;%JAVA_HOME%\bin";

The setx command permanently updates the environment variables. To add/update system environment variables, you must use the -m switch and open the command prompt using Administrator privilege: Click Start, type cmd . When the cmd.exe icon appears, right click and select Run as administrator.

To add/update system environment variables:

setx -m JAVA_HOME "C:\Program Files\Java\jdk1.8.0" setx -m PATH "%PATH%;%JAVA_HOME%\bin";

I prefer setting the environment variables using this command-line alternative. It’s quick and easy instead of going through several dialogs like using the GUI.

To summary, here are some important points:

• Always set JAVA_HOME when preparing development environment for Java.
• JAVA_HOME points to the installation directory of JDK.
• The PATH variable should contain an entry pointing to JAVA_HOME\bin .
• Environment can be set either via the GUI or command line prompt.

Related Tutorials:

About the Author:

Nam Ha Minh is certified Java programmer (SCJP and SCWCD). He started programming with Java in the time of Java 1.4 and has been falling in love with Java since then. Make friend with him on Facebook and watch his Java videos you YouTube.

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