java - Concatenate string values with delimiter handling null and empty strings?

Question

(This question already has answers here): question from:https://stackoverflow.com/questions/36705880/concatenate-string-values-with-delimiter-handling-null-and-empty-strings

Answer 1

String joined = 
    Stream.of(val1, val2, val3, val4)
          .filter(s -> s != null && !s.isEmpty())
          .collect(Collectors.joining(","));