Web Reference: Represents a predicate (boolean-valued function) of one argument. This is a functional interface whose functional method is test(Object). Oct 21, 2022 · A Functional Interface is an Interface which allows only one Abstract method within the Interface scope. There are some predefined functional interface in Java like Predicate, consumer, supplier etc. This tutorial is a guide to different functional interfaces present in Java 8, as well as their general use cases, and usage in the standard JDK library.
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