How to Configure the JAVA_HOME Environment Variable on macOS?

Configuring JAVA_HOME Environment Variable on Mac OS X 10.9

As a new user venturing into the realm of Java development on macOS, setting the JAVA_HOME environment variable can be a daunting task. This guide will provide a step-by-step walkthrough to help you establish Java in your Mac's environment.

Step 1: Locate the JAVA_HOME Directory

Open Terminal and execute the following command:

/usr/libexec/java_home

This command will display the path to the Java installation directory. Copy this path.

Step 2: Add JAVA_HOME to Bash Profile

Open the bash profile using a text editor.

For bash users:

nano ~/.bash_profile

For zsh users (macOS Catalina and newer):

nano ~/.zshrc

Step 3: Set JAVA_HOME

Append the following line to the bash profile:

export JAVA_HOME="/path/to/java_installation"

Replace "/path/to/java_installation" with the path obtained in Step 1.

Step 4: Reload the Shell

Restart your shell to make the changes take effect.

For bash users:

exec bash

For zsh users:

exec zsh

Step 5: Verify JAVA_HOME

To ensure the JAVA_HOME variable has been set correctly, run the following command:

echo $JAVA_HOME

This should display the path to the Java installation directory.

Additional Notes:

• If you have multiple JDK versions installed, you can specify a specific one using the "-v" flag in the "/usr/libexec/java_home" command. For example, to set JAVA_HOME to Java version 1.7:

echo export "JAVA_HOME=$(/usr/libexec/java_home -v 1.7)" >> ~/.bash_profile

• Remember to replace the path in the above commands with the path to your Java installation.

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