code: public void writeNext(String[] nextLine, boolean applyQuotesToAll) {
  
        if (nextLine == null) {
           return;
        }
  
        StringBuilder sb = new StringBuilder(nextLine.length * 2); // This is for the worse case where all elements have to be escaped.
        for (int i = 0; i < nextLine.length; i++) {
  
           if (i != 0) {
              sb.append(separator);
           }
  
           String nextElement = nextLine[i];
  
           if (nextElement == null) {
              continue;
           }
  
           Boolean stringContainsSpecialCharacters = stringContainsSpecialCharacters(nextElement);
  
           if ((applyQuotesToAll || stringContainsSpecialCharacters) && (quotechar != NO_QUOTE_CHARACTER)) {
              sb.append(quotechar);
           }
  
           if (stringContainsSpecialCharacters) {
              sb.append(processLine(nextElement));
           } else {
              sb.append(nextElement);
           }
  
           if ((applyQuotesToAll || stringContainsSpecialCharacters) && (quotechar != NO_QUOTE_CHARACTER)) {
              sb.append(quotechar);
           }
        }
  
        sb.append(lineEnd);
        pw.write(sb.toString());
     }
docs: Writes the next line to the file.
  
  @param nextLine         a string array with each comma-separated element as a separate
  entry.
  @param applyQuotesToAll true if all values are to be quoted.  false applies quotes only
  to values which contain the separator, escape, quote or new line characters.