The functional consumer interface is a key part of the Java Streams API. Here is a simple Consumer interface example to show you how to use this Java component.

More about Java interfaces What can you do with interfaces in your Java programs? Get an overview with Jeff’s Six roles of the Java interface.

I have an interface that returns a class containing common classes. But where do I define the class? What I want is something like: public interface Foo { String getName(); FooType getFoo(int a ...

We should all aspire to create an interface that enables and encourages end users to use an application frequently so they become more confident, efficient and productive.