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.

Applying the open-closed principle in Java The addition of an interface to our example helps to overcome the violation of the open-closed principle. An interface allows for infinite future extensions ...

Listing 2 shows Java class StackImpl, which implements the Stack interface. Notice that the package is declared as dbc.test, which is the package identified in the dbc.properties file described in ...

Functional programming with a Java Consumer Sometimes programmers new to lambdas and streams get intimidated by the components defined in the java.util.function package, so I always like to remind ...