How to set JAVA_HOME environment variable on Mac OS X?

How to set JAVA_HOME environment variable on Mac OS X?

To set the JAVA_HOME environment variable on macOS, you can follow these steps:

  1. Determine the Java Installation Path:

    • First, you need to find the installation path of your Java Development Kit (JDK) or Java Runtime Environment (JRE). You may have OpenJDK or Oracle JDK installed. You can check the installation path by opening a Terminal window and running the following command:
      /usr/libexec/java_home -v 1.8
      Replace 1.8 with the version of Java you want to set as JAVA_HOME. This command will display the path to the specified version of Java.

  2. Set the JAVA_HOME Environment Variable:

    • Open the Terminal application on your Mac.
    • To set the JAVA_HOME environment variable temporarily for the current session, use the export command:
      export JAVA_HOME=/path/to/your/java
      Replace /path/to/your/java with the actual path to your Java installation directory.
    • To set the JAVA_HOME environment variable permanently for all sessions, you can add the export command to your shell profile configuration file. The most common shell profiles are ~/.bash_profile for the Bash shell or ~/.zshrc for the Zsh shell. You can edit the profile file using a text editor, for example:
      nano ~/.bash_profile
      Add the following line to the profile file (replace /path/to/your/java with the actual path to your Java installation directory):
      export JAVA_HOME=/path/to/your/java
      Save the file and exit the text editor.

  3. Make the Changes Take Effect:

    • After setting the JAVA_HOME environment variable, you need to make the changes take effect:
      • If you edited ~/.bash_profile, you can either restart your Terminal or run the following command to apply the changes to your current session:
        source ~/.bash_profile
      • If you edited ~/.zshrc, you can either restart your Terminal or run the following command to apply the changes to your current session:
        source ~/.zshrc

  4. Verify the JAVA_HOME Setting:

    • To verify that the JAVA_HOME environment variable is set correctly, you can run the following command:
      echo $JAVA_HOME
      It should display the path to your Java installation directory.

That's it! You've successfully set the JAVA_HOME environment variable on macOS. This variable is commonly used by Java applications and development tools to locate the Java installation directory.

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