How to Configure JAVA_HOME on macOS Mojave and Older?

Configuring JAVA_HOME on macOS Mojave to Lion

Java is an optional component in recent macOS versions. After installation, the JAVA_HOME environment variable may not be set correctly. Here's how to resolve this issue:

With the Java optional package or Oracle JDK installed, add one of the following lines to the ~/.bash_profile file:

• export JAVA_HOME="(/usr/libexec/java_home -v 1.6)"
• export JAVA_HOME="(/usr/libexec/java_home -v 1.7)"
• export JAVA_HOME="(/usr/libexec/java_home -v 1.8)"
• export JAVA_HOME=(/usr/libexec/java_home)

For openjdk installations using brew, execute sudo ln -sfn /usr/local/opt/openjdk/libexec/openjdk.jdk /Library/Java/JavaVirtualMachines/openjdk.jdk for the previous commands to work.

Note: The -v flag has been added as suggested by Jilles van Gurp. This ensures that the correct version of Java is selected.

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