Windows find java home path

Windows find java home path

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finding location java_home in Windows 10

I need help finding the location of my java_home/bin, or if it even exists. If it doesn’t, what more do I need to install? I am following some installation directions, and one of the steps says:

Ensure that the Java Runtime Environment (JRE) is installed on the computer and that the java_home/bin directory is defined in the system path.

I can’t even find the path of java_home. Disregarding the directions for other OS, this is the closest I’ve come to finding something helpful. However, when I type the prescribed command, echo %java_home% it just returns %java_home% as a string, percent signs and all. When I try % java -version down further in the page, it tells me %java isn’t a recognized command, program, or batch file. I have Java 8 Update 60 installed, I can see it in my list of programs I can uninstall. From the quote though, I have in mind that if I have a JRE installed, then java_home\bin exists. However, I’ve had File Explorer search very nearly the entire computer, and found nothing.

2 Answers 2

I need help finding the location of my java_home/bin

• «Start» > «Control Panel» > «Java».
• Select «Java» tab.
• Click «View»
• Look in the «Path» column for version of the JRE you have installed.

In the above example the «Path» contains:

JAVA_HOME should point to the root directory of the Java installation, so in this case:

And the PATH should contain JAVA_HOME\bin , in this case:

From a command prompt we can set these values using the following commands:

setx JAVA_HOME C:\apps\jdk setx PATH C:\apps\jdk\bin;%PATH% 

• Modify the above commands as appropriate for your Java installation.
• These are System not User environment variables.

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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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Find Java Location in Windows

1. Find Java Location Using Command where java
2. Find Java Location Using Command set JAVA_HOME
3. Find Java Location Using Command dir /b /s java.exe
4. Find Java Location Using Command gcm -All java in Windows PowerShell

Today, we will see how to find out where Java is located in Windows. There are multiple ways and commands to do this; we will check out various commands that return the Java location windows.

Find Java Location Using Command where java

The most commonly used command to get the current location of Java in Windows is where java . This is a Windows command that works just like the whereis command in Linux Operating System. The where command is used to display the location of the executable. It usually uses a search pattern.

As shown below, when we run the command where java in the command line of Windows, it returns the location of java.exe .

C:\User\.jdks\openjdk-15.0.1\bin\java.exe 

Find Java Location Using Command set JAVA_HOME

The next technique to get the location of Java in Windows is to use the command set JAVA_HOME . In Windows, the path of Java or JDK is stored in the environment variables. The location is stored in the variable named PATH , a list of directories that can be used to access certain programs like Java directly without writing the whole path.

We can set the path of Java by the command set JAVA_HOME and then specify the path. But if the value is already set, it will return the path set to the variable JAVA_HOME . It completes our goal as this is the directory in which Java is located.

C:\Users\Rupam Saini>set JAVA_HOME 

JAVA_HOME=C:\Users\Rupam Saini\.jdks\openjdk-15.0.1 

Find Java Location Using Command dir /b /s java.exe

The dir command shows all the folders and sub-folders in the current location. We can use this command to get the locations of Java as there might be more than one executable of Java in a single Windows machine as some programs use their own Java environment.

We use the dir command with three parameters, first is /b that displays only the directory path without any extra details. In contrast, the /s parameter lists every occurrence of the specified file in the current directory and subdirectories, and at last, the execute name that is java.exe .

C:\User\.jdks\openjdk-15.0.1\bin\java.exe C:\User\AppData\Local\JetBrains\IntelliJ IDEA Community Edition 2020.3\jbr\bin\java.exe 

Find Java Location Using Command gcm -All java in Windows PowerShell

In all the examples in this tutorial, we use the traditional command-line,, but this method requires the Windows PowerShell, a command-line but with advanced capabilities. In PowerShell, we use the gcm command that is short for get-command . It returns all the commands in the machine.

We use gcm with two parameters; the first is -All that shows all the instances of the command in the current machine, and the second parameter is the command name. In our case, the command name is java . In return, it outputs some details about the command like the Command Type, the name of the executable executed on command, the version, and the executable source. The source is where Java is located.

CommandType Name Version Source ----------- ---- ------- ------ Application java.exe 15.0.1.0 C:\User\.jdks\openjdk-15. 

Rupam Saini is an android developer, who also works sometimes as a web developer., He likes to read books and write about various things.

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