In this chapter we were introduced to each other with Java. We do not know too much from each other but we got acquainted. We have installed the Java environment: Java, JDK and integrated development environment. We have written a small program and had a brief look at what can be done using the development tools. This is far from mastery but even the longest journey starts with a first step, which is sometimes the hardest to make. We have done it in our Java journey. We started rolling and for the enthusiasts that we are, nothing can stop us walking all the way long.