This forum is all about Java, one of the most popular object-oriented programming languages. By asking Java-related questions (click on the “Ask a new question” link) and answering Java-related questions (click on the “Answer a question” link), you will learn a lot. Java is platform-independent, i.e. write once run everywhere. It is used in building web, desktop, and mobile application. So as to program Android, the most popular mobile platform from Google, you need to know Java because it is the base language. There is a significant demand for Java developers and participating in this forum will help you become one.