> For the complete documentation index, see [llms.txt](https://danhnhan-phung.gitbook.io/dnpi/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://danhnhan-phung.gitbook.io/dnpi/command-line/java_home-on-macos.md).

# JAVA\_HOME on MacOS

This document shows how to install, change, and pick the java version on MacOS

`/usr/libexec/java_home` is the simplest maintainable way of setting `JAVA_HOME` on macOS.

You can use `java_home` to:

* Find all installed JDKs
* Get value for `JAVA_HOME` for a specific JDK version
* Get the value of `JAVA_HOME` for the default JDK version
* Execute specific versions of Java commands

## Check Installed Java Versions

```
/usr/libexec/java_home -V

//you will see something like:

Matching Java Virtual Machines (7):
    14.0.1 (x86_64) "Oracle Corporation" - "Java SE 14.0.1" /Library/Java/JavaVirtualMachines/jdk-14.0.1.jdk/Contents/Home
    11.0.12 (x86_64) "Oracle Corporation" - "Java SE 11.0.12" /Library/Java/JavaVirtualMachines/jdk-11.0.12.jdk/Contents/Home
    11.0.2 (x86_64) "Oracle Corporation" - "OpenJDK 11.0.2" /Library/Java/JavaVirtualMachines/jdk-11.0.2.jdk/Contents/Home
    1.8.291.10 (x86_64) "Oracle Corporation" - "Java" /Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home
    1.8.0_312 (arm64) "Azul Systems, Inc." - "Zulu 8.58.0.13" /Library/Java/JavaVirtualMachines/zulu-8.jdk/Contents/Home
    1.8.0_281 (x86_64) "Oracle Corporation" - "Java SE 8" /Library/Java/JavaVirtualMachines/jdk1.8.0_281.jdk/Contents/Home
    1.8.0_261 (x86_64) "Oracle Corporation" - "Java SE 8" /Library/Java/JavaVirtualMachines/jdk1.8.0_261.jdk/Contents/Home
/Library/Java/JavaVirtualMachines/jdk-14.0.1.jdk/Contents/Home
```

## Check value of current used Java Version

```
/usr/libexec/java_home
```

## Set JAVA\_HOME to specific Java Version

```
export JAVA_HOME='/usr/libexec/java_home -v 1.7'

//if you want to set it to the default java version

export JAVA_HOME='/usr/libexec/java_home'
```

## Remove Java SDK

```
sudo rm -rf /Library/Java/JavaVirtualMachines/jdk-<version>.jdk
```