In this tutorial you used the New Project Wizard to create an IntelliJ IDEA project. You then created a package structure and class called HelloWorld.java.

You created a class that printed Hello World to the console using both Live Templates and Code Completion.

You ran that project using the gutter icons, and then you used the Project Structure dialog to package the application into a JAR file.

You then created a new Run Configuration for the JAR file and ran the application again with the new run configuration.

Finally, you made a change to your HelloWorld.java file and tested that change with the run configuration that you made for your JAR file to check that it was being rebuilt before it was being run.