StreamNotLoop.java

public List<String> imperative(List<String> terms) {
  List<String> result = new ArrayList<String>(terms.size());
  
  for(term : terms) {
    if(term.length > 3) {
      restult.add(term.toUpperCase());
    }
  }
  
  return result;
}

public List<String> functional(List<String> terms) {
  return terms.stream().
    filter(term -> term.length > 3).
    map(String::toUpperCase).
    toList()
  ;
}