An interface is a class that contains only the method headings and each method heading is terminated with a semicolon.

Interface

A programming structure that allows the computer to enforce certain properties on an object (in Java, C#, etc.), or a medium through which user interacts with the machine.

Method Headings

The part of a method declaration in programming that specifies the method name, return type, and any parameters.

Class

A blueprint for creating objects in object-oriented programming, consisting of methods and attributes.