Learn how to code in Java on a Mac: Where to learn Java You are now completely set up to learn Java on your Mac. Obviously you need to progress beyond just writing “Hello World” on the screen.

3] Run a Java or JAR file. Now when you double click on the JAR file, it will automatically run like how EXE files execute. If there is a problem with version, the file should inform you.

To be precise, say if you have installed Java in the path C:\Program Files\Java\jdk1.8.0_121 on your computer, ... then it may not be mandatory for users to set up JAVA_Home in your system.