> For the complete documentation index, see [llms.txt](https://appsecurity.gitbook.io/devops/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://appsecurity.gitbook.io/devops/ppc/ppc-langs/backend/jvm/java-env-manager.md).

# Java Env Manager

## VS Code Extension

Можно устанавливать последние версии Java через расширение [JDK](https://marketplace.visualstudio.com/items?itemName=Oracle.oracle-java). После установки `Settings -> Command Palette -> Download, install and use JDK`.

## jenv

Сложно вручную переключаться между окружениями и помнить, где что установлено. 

[jenv](https://github.com/jenv/jenv) — инструмент, который позволяет удобно управлять окружениями на компьютере.

Далее пример использования для MacOS:

<pre><code>$ brew install jenv

// Add to .zshrc
export PATH="$HOME/.jenv/bin:$PATH"
eval "$(jenv init -)"

// Install some version Java
$ brew install openjdk@11  // 11
$ brew install openjdk@8  // 8
$ brew install openjdk@17  // 17
$ brew install openjdk@18  // 18
<strong>
</strong><strong>// Чтобы система могла найти java, надо добавить линки в папку /Library/Java/JavaVirtualMachines/
</strong>$ sudo ln -sfn /usr/local/opt/openjdk@8/libexec/openjdk.jdk /Library/Java/JavaVirtualMachines/openjdk-8.jdk
$ sudo ln -sfn /usr/local/opt/openjdk@11/libexec/openjdk.jdk /Library/Java/JavaVirtualMachines/openjdk-11.jdk
$ sudo ln -sfn /usr/local/opt/openjdk@17/libexec/openjdk.jdk /Library/Java/JavaVirtualMachines/openjdk-17.jdk
$ sudo ln -sfn /usr/local/opt/openjdk@18/libexec/openjdk.jdk /Library/Java/JavaVirtualMachines/openjdk-18.jdk
<strong>
</strong><strong>// Add path to openjdk home to jenv
</strong><strong>$ jenv add /Library/Java/JavaVirtualMachines/openjdk-8.jdk/Contents/Home/
</strong>$ jenv add /Library/Java/JavaVirtualMachines/openjdk-11.jdk/Contents/Home/
$ jenv add /Library/Java/JavaVirtualMachines/openjdk-17.jdk/Contents/Home/
$ jenv add /Library/Java/JavaVirtualMachines/openjdk-18.jdk/Contents/Home/
<strong>
</strong><strong>// Uvailable versions
</strong><strong>$ jenv versions
</strong><strong>
</strong><strong>// Set java env
</strong><strong>$ jenv global  // Установить глобально версию java
</strong><strong>$ jenv local   // Установить в локальной папке версию java
</strong><strong>$ jenv shell   // Установить в текущем терминале версию java
</strong></code></pre>


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