Functional Interfaces in Java 8 || By Shiva

Описание к видео Functional Interfaces in Java 8 || By Shiva

It contains exactly one abstract method. This type of interface is widely used in functional programming, allowing instances of the interface to be created with lambda expressions or method references

Key Characteristics of Functional Interface:

1/ Single Abstract Method (SAM)
2/ A functional interface can only have one abstract method.
3/ Functional interfaces can have multiple default or static methods, which provide default implementations or utility functions. These methods do not count towards the single abstract method requirement
4/ In Java, the @FunctionalInterface annotation can be used to explicitly mark an interface as functional.

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