As we start looking through the book we realize it's about writing programs in a language called Java. Exciting as this may be it's also peculiar since Java has its own meaning (semantic) rules and especially syntax we need to learn and follow. So we compile and run, as we discuss, the following programs: HelloPrinter.java, PrintTester.java, and we spend some time pointing out that most of our time we'll produce and fix errors. The one thing we need to remember about errors: they're hard to find, easy to fix. So you need to be patient. We all need to be patient, that's the key to everything.