So far, we have launched the "Hello World" game via the command line, and haven't seen a single line of code so far. Let's change that.
To do this, I will use IntelliJ IDEA. If you are using Android Studio, the screenshots will look familiar. If you are using Eclipse, I am sure you will be able to see the common concepts.
To begin with, we need to generate the appropriate IDE project files. Again, this is using Gradle to do the heavy lifting for us.
Once again, on the command line, run the following (pick the one that applies):
Now, Gradle will have generated some project files. Open your IDE of choice and open the project.