denfinder 
A project that helps you find which neighborhood you should live in.
Done as part of Dr. Eunjee Song's CSI 3372 course at Baylor University.
Using API keys
This project reads API keys from src/main/java/template/util/ApiKeys.java. Notice that environment variables are used to keep the API keys themselves out of source control. In Eclipse, right click on Main.java -> Run As... -> Run Configurations -> Environment -> New... -> enter a key. Keep adding keys until you have them all added. Here's an example of how it might look:
