This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
Does "Party" have such a method? If not, it's not intended to be run as a standalone application; perhaps it's part of a larger example, which you would run using some other class, or perhaps it's just meant as a partial example, not intended for you to run.