The Java 2 SDK organizes its vast collection of classes and interfaces into a tree-like hierarchy of packages within packages, which is equivalent to directories within directories. That hierarchy ...

Abstract classes and interfaces in Java serve fundamentally ... As an example, the Java Collections Framework includes the AbstractList class, which uses the state of variables.

The Java Platform provides the most commonly used data structures in the form of the Collections Framework ... can be referred by the interface, rather than by the class), utility methods defined ...

Any developer who wants to master functional programming in Java will need to be comfortable with the Predicate interface and will make manipulating collection classes with lambda expressions ...

Community driven content discussing all aspects of software development from DevOps to design patterns. There are only half a dozen classes you really need to master to become competent in the world ...