@@ -0,0 +1,218 @@
+// http://codingbat.com/prob/p186894%0A%0Apublic List%3CString%3E lower(List%3CString%3E strings) %7B%0A  strings = strings.stream()%0A    .map(string -%3E string.toLowerCase())%0A    .collect(Collectors.toList());%0A    %0A  return strings;%0A%7D%0A

Create lower.java