// "Replace Stream API chain with loop" "true" import java.util.*; import java.util.stream.*; public class Main { private static void test(List<String> test) { StringBuilder sb = new StringBuilder(); for (String s : test) { sb.append(s); } System.out.println("x"+ sb.toString() +"y"); } public static void main(String[] args) { System.out.println(test(Arrays.asList("a", "b", "c"))); } }