How to Change Your Default Java Version on macOS?

How to Switch to a Different Java Version in macOS

Changing the default Java version on macOS requires a specific set of steps.

Determining the Installed Java Versions

Start by identifying the available Java versions on your system:

/usr/libexec/java_home -V

This command displays a list of installed Java versions.

Selecting and Setting the Default Java Version

Once you have identified the desired version, use the following command:

export JAVA_HOME=`/usr/libexec/java_home -v <version>`

where is the version you want to make default.

Alternatively, you can specify only the major version:

export JAVA_HOME=`/usr/libexec/java_home -v <major_version>`

Verifying the Change

To check if the default Java version is updated, run:

java -version

This should display information about the new default Java version.

Setting the Default Java Version Permanently

To ensure the change is persistent, add the export JAVA_HOME command to your shell's initialization file.

Specific Examples

For Bash:

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

For Fish:

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

For Zsh:

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

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