Java 8 BiConsumer Interface

by Online Tutorials Library July 22, 2022

Java BiConsumer Interface

BiConsumer Interface accepts two input arguments and does not return any result. This is the two-arity specialization of Consumer interface. It provides a functional method accept(Object, Object) to perform custom operations.

Java BiConsumer Interface Methods

Method	Description
void accept(T t, U u)	It performs this operation on the given arguments.
default BiConsumer<T,U> andThen(BiConsumer<? super T,? super U> after)	It returns a composed BiConsumer that performs, in sequence, this operation followed by the after operation. If performing either operation throws an exception, it is relayed to the caller of the composed operation. If performing this operation throws an exception, the after operation will not be performed.

Java BiConsumer Interface Example 1

 import java.util.function.BiConsumer; public class BiConsumerInterfaceExample { static void ShowDetails(String name, Integer age){ System.out.println(name+” “+age); } public static void main(String[] args) { // Referring method BiConsumer<String, Integer> biCon = BiConsumerInterfaceExample::ShowDetails; biCon.accept(“Rama”, 20); biCon.accept(“Shyam”, 25); // Using lambda expression BiConsumer<String, Integer> biCon2 = (name, age)->System.out.println(name+” “+age); biCon2.accept(“Peter”, 28); } } 

Output:

Rama 20 Shyam 25 Peter 28

Java BiConsumer Interface Example 2

 import java.util.function.BiConsumer; import java.util.HashMap; import java.util.Map; public class BiConsumerInterfaceExample { static void ShowDetails(Map<Integer, String> map, String mapName){ System.out.println(“———-“+mapName+” records———–“); map.forEach((key, val)->System.out.println(key+” “+val)); } public static void main(String[] args) { Map<Integer, String> map = new HashMap<Integer,String>(); map.put(100, “Mohan”); map.put(110, “Sujeet”); map.put(115, “Tom”); map.put(120, “Danish”); // Referring method BiConsumer<Map<Integer, String>, String> biCon = BiConsumerInterfaceExample::ShowDetails; biCon.accept(map, “Student”); } } 

Output:

----------Student records----------- 115 Tom 100 Mohan 120 Danish 110 Sujeet

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