In this Java 101 tutorial, I’ve explained how interfaces differ from classes, and showed you how to declare, implement, and extend interfaces in your Java programs.

List ArrayList Set HashSet Queue Vector The Collection interface defines methods that help developers work with a group of objects. Any Java developer who has interacted with a collection class would ...

Single responsibility. Open/closed. Liskov substitution. Interface segregation. Dependency inversion. Benefits of the single responsibility principle Software components built according to the SRP ...

Java lets you declare interfaces inside of classes. Once declared, an interface is automatically a static member of the class. There is no need to declare the interface with the static keyword.