An interface is a tool used in programming and technology to define a set of methods or behaviors that a class must implement). In Java, an interface is an abstract type that is used to declare a behavior that classes must implement). Interfaces are declared using the interface keyword and may only contain method declarations, but not method implementations). A class that implements an interface must implement all of the non-default methods described in the interface, or be an abstract class). Object references in Java may be specified to be of an interface type, and in each case, they must either be null or be bound to an object that implements the interface).
In general, an interface is a device or system that unrelated entities use to interact. For example, a remote control is an interface between a person and a television set, and the English language is an interface between two people. In technology, interfaces help developers create points of interaction between hardware and software components.
Overall, an interface is a way to define a set of behaviors that a class must implement, and it is used in programming and technology to create points of interaction between different entities.
