// "Replace Stream API chain with loop" "true" import java.util.Arrays; import java.util.Collections; import java.util.List; public class Main { private static List[] test(int[] numbers) { return Arrays.stream(numbers).boxed().map(n -> Collections.singletonList(n)).toArray(List[]::new); } public static void main(String[] args) { System.out.println(Arrays.asList(test(new int[] {1,2,3}))); } }