How Do I Set the Default Java Version on macOS?

How to Configure the Default Java Version in macOS

Introduction

This article provides a comprehensive overview of how to modify the default Java version on a macOS system.

Solution

The first step is to determine the available Java versions:

/usr/libexec/java_home -V

This command outputs a list of versions and their corresponding paths.

To set a specific version as the default, assign the path to the JAVA_HOME environment variable. For example, to set version 1.6.0_65-b14-462:

export JAVA_HOME=`/usr/libexec/java_home -v 1.6.0_65-b14-462`

You can also specify the major Java version:

export JAVA_HOME=`/usr/libexec/java_home -v 1.8`

Verifying the change:

java -version

The output should display the correct Java version.

To make the change permanent, add the export JAVA_HOME… command to your shell's initialization file:

Bash:

export JAVA_HOME=$(/usr/libexec/java_home -v 1.8)

Fish:

set -x JAVA_HOME (/usr/libexec/java_home -d64 -v1.8)

Zsh:

export JAVA_HOME=$(/usr/libexec/java_home -v 1.8.0)

Once the change is made, you can source the initialization file to activate it:

source ~/.zshrc

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