This project is constantly pointing to whatever project is the current "work in progress" so as such, you need to modify the build.xml to suit. Common objects & helper libraries are in src/common Examples: .src/common/BagOf.java //a generic interface for bag's of things .src/common/BagOfLetters.java //specific implementation for storing characters .src/common/ChallengeInput.java //specific to /r/DailyProgrammer style input .src/common/EncapsulatedDataParser.java //parses data in the "(xxxxx,yyyyy,zzzzz)" format