Java is a popular, object-oriented programming language used for building cross-platform applications. It follows the “write once, run anywhere” philosophy, allowing developers to run Java programs on any device that has a Java Virtual Machine (JVM) installed. Java’s syntax is similar to C++, but it simplifies memory management by using garbage collection. It supports key programming concepts such as inheritance, polymorphism, and encapsulation. Java is commonly used for developing web applications, mobile apps (Android), and large-scale enterprise systems. Tutorials on Java typically cover topics like variables, loops, conditionals, classes, objects, exceptions, and libraries to build robust applications.