lambda function java
There are few functional interfaces namely Consumer, Supplier, Predicate and Functions - Consumer: + 1 input, 0 output + java.util.function.Consumer + example: Consumer<List<String>> printConsumer = list -> list.stream().forEach(System.out::println); - Supplier: + 0 input, 1 output + java.util.function.Supplier + example: Supplier<Double> doubleSupplier1 = () -> Math.random(); - Predicate: + 1 input, 1 boolean output + java.util.function.Predicate + example: Predicate<String> nameStartsWithS = str -> str.startsWith("S"); - Function: + 1 input, 1 output + java.util.function.Function + example: Function<String, Integer> nameMappingFunction = String::length;