MAC OS - Set JAVA_HOME

While running Java applications, sometimes you may have to set JAVA_HOME environment variable. Here are the instructions to quickly set JAVA_HOME on your MAC OS.

1. Open Terminal
2. To Confirm if you have Java
• Type command: "which java"
• Hit Enter/Return button
• The command should return something like this: /usr/bin/java
3. To get location of Java (detailed steps are documents here)
• Type command: /usr/libexec/java_home
• Hit Enter/Return button
• The command should return something like this: /Library/Java/JavaVirtualMachines/jdk1.7.0_79.jdk/Contents/Home
4. To Set JAVA_HOME for single session
• Type command: export JAVA_HOME=/Library/Java/JavaVirtualMachines/jdk1.7.0_79.jdk/Contents/Home
• Hit Enter/Return button
• Type command to verify: echo $JAVA_HOME
5. To Set JAVA_HOME permanently
•  Type command: vi ~/.bash_profile
• This will open bash_profile file
• Go to the end, and add following lines
• JAVA_HOME=/Library/Java/JavaVirtualMachines/jdk1.7.0_79.jdk/Contents/Home
• export JAVA_HOME;
• Save the file
• Restart Terminal
• Type command to verify: echo $JAVA_HOME

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