Section 8.1.3 of the Java Language Specification (JLS) states, “The class java.lang.Object … is the primordial class and has no direct superclass.” That means java.lang.Object serves as the root class ...

Object-oriented systems are usually partitioned into layers of related responsibilities and only dependencies in one direction are allowed, from higher layers (more specific, less reusable) to lower ...

If you're not familiar with object-oriented programming, some of the concepts can be hard to understand, especially if you're a longtime procedural language programmer. Follow along as we take a look ...