在Java 8中，如何从Stream获取int数组 <int[]> 不使用forEach

Question

How can I convert Stream<int[]> into int[] without using forEach ?

final Stream<int[]> stream = foos.stream()
            .map(foos -> insertQuery(contact, create))
            .map(create::batch)
            .map(Batch::execute); //Batch::execute will return the int[]

Answer 1

使用flatMapToInt

int[] result = stream.flatMapToInt(Arrays::stream).toArray();