Interface – Interface is the blueprint of class, specifying what a class should do. The interface in Java refers to an abstract “class” that is used to group related methods with “empty ...

Abstract classes and interfaces in Java serve fundamentally different purposes. Learn the differences between these Java language elements and how to use them in your programs.

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.

The Collections Framework defines two other interfaces that are used to sort objects: java.util.Comparable and java.util.Comparator. Any class implementing the Comparable interface defines a ...

The functional Predicate interface gets used extensively by the Java 8 Streams API. Any developer who wants to master functional programming in Java will need to be comfortable with the Predicate ...

Sealed classes make Java an even more powerful and expressive language and set the stage for even more sophisticated techniques such as pattern matching, which we'll explore in a subsequent article. A ...