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 · There are some predefined functional interface in Java like Predicate, consumer, supplier etc. The return type of a Lambda function (introduced in JDK 1.8) is a also functional interface. The Functional Interface PREDICATE is defined in the java.util.function package. 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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