This free application for the Java programming language will teach you the basics of the language, as well as provide you with an in-depth look at the different types of variables, classes, objects, arrays, and so on. It also comes with a comprehensive collection of sample Java codes, along with a number of exercises to help you test your knowledge.

This is an extremely useful tool for all those interested in learning Java programming, regardless of whether they are a beginner or an expert. It covers a large number of topics and concepts, making it perfect for anyone who wants to learn the language.