functional-interfaces

3 tutorials tagged “functional-interfaces”.

Built-In Functional Interfaces in JavaThe java.util.function package: Predicate, Function, Consumer, Supplier, UnaryOperator, BinaryOperator and BiFunction, with their methods and examples.Java · medium · 5 min · Nov 13, 2026
Composing Functions in JavaBuild bigger functions from small ones with andThen, compose, and, or, negate, Predicate.not and Function.identity. Learn each with examples.Java · medium · 4 min · Nov 13, 2026
Primitive Functional Interfaces in JavaIntPredicate, IntFunction, ToIntFunction, IntUnaryOperator and friends avoid boxing when lambdas work with int, long and double. Learn them with examples.Java · medium · 4 min · Nov 13, 2026

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