How Do I Set a Default Java Version on macOS?

How to Set the Default Java Version on macOS

Changing the default Java version on a Mac requires modifying environment variables. Here are the steps:

Run the following command to view available Java versions:

/usr/libexec/java_home -V

Select the desired Java version (e.g., 1.8.0_05) and export the JAVA_HOME environment variable using:

export JAVA_HOME=`/usr/libexec/java_home -v 1.8.0_05`

Alternatively, specify only the major version:

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

Verify the default Java version:

java -version

Add the export command to your shell's initialization file. For example, in 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 (in .zshrc file):

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

Save the changes and source the file:

source ~/.zshrc

Confirm the updated default Java version:

echo $JAVA_HOME
java -version

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