including the difference between classes and interfaces, see my Java 101 tutorial Working with interfaces in Java. You access an enclosed interface by prefixing its name with the enclosing ...

If you want to master functional programming, the best place to start is with the Java Function interface. This example will show you four different ways to implement this functional interface in your ...

In this functional programming tutorial, we will work through a Java Supplier interface example. Java’s functional supplier interface can be used any time a function needs to generate a result without ...

That hierarchy allows Sun Microsystems to easily distribute (and you to easily work with) those classes and interfaces. Examples of Java’s packages include: Only one package directive can appear ...