Wednesday 6 September 2017

How to use flatMapToInt method to convert Stream of intArray to IntStream | Streams in Java 8


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FlatMapDemo.java
import java.util.Arrays;
import java.util.stream.IntStream;
import java.util.stream.Stream;

public class FlatMapDemo
{
    public static void main(String[] args)
    {

        int[][] intArray = {{1, 2, 3}, {4,5,6}};

        //1. Stream<int[]>
        Stream<int[]> arrayStream = Stream.of(intArray);

        //2. Stream<int[]> -> flatMap -> IntStream
        IntStream intStream = arrayStream.flatMapToInt(x -> Arrays.stream(x));

        intStream.forEach(x -> System.out.println(x));
    }

}
Output
1
2
3
4
5
6

Click the below link to download the code:
https://sites.google.com/site/ramj2eev1/home/javabasics/StreamDemo_flatmap_intarray.zip?attredirects=0&d=1

Github Link:
https://github.com/ramram43210/Java/tree/master/BasicJava/StreamDemo_flatmap_intarray

Bitbucket Link:
https://bitbucket.org/ramram43210/java/src/53e39342c1c41555c6e548783b3cf96ab7bd9ee6/BasicJava/StreamDemo_flatmap_intarray/?at=master

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