// "Replace Stream API chain with loop" "true" import java.util.*; import java.util.stream.Collectors; public class Main { public static Map> test(List strings) { return strings.stream().filter(s -> !s.isEmpty()).collect(Collectors.partitioningBy(s -> s.length() > 1)); } public static void main(String[] args) { System.out.println(test(Arrays.asList())); System.out.println(test(Arrays.asList("a", "bbb", "cc", "d", "eee", ""))); } }