Java programming is defined as an assortment of objects which communicate through invoking one another's methods. Before getting insight into the top-tier java programming courses, let's learn terms related to java training. Java is a strong general-purpose programming language used to develop mobile and desktop applications, embedded systems, processing big data, and more. Based on Oracle's report (the firm that owns Java), Java operates on more than 3 billion gadgets globally, making java programming among the popular languages.