code: private String listToString(List<String> stringList){
  		StringBuilder concat = new StringBuilder();
  		for(String str:stringList){
  			concat.append(str);
  			concat.append(System.getProperty("line.separator"));
  		}
  		return concat.toString();
  	}
docs: Concatenates a list of Strings to one line-separated String
  
  @param stringList a list of Strings
  @return a single line-separated String containing all Strings from the list