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