Java array join long[] array to String

//package com.demo2s;

public class Main {
    public static void main(String[] argv) throws Exception {
        long[] tokens = new long[] { 34, 35, 36, 37, 37, 37, 67, 68, 69 };
        String delimiter = "";
        System.out.println(joinLongs(tokens, delimiter));
    }//from  w ww  .java  2  s  . co  m

    /**
     * Concatenates the given long[] array into one String, inserting a delimiter
     * between each pair of elements.
     */
    public static String joinLongs(long[] tokens, String delimiter) {
        if (tokens == null)
            return "";
        StringBuilder result = new StringBuilder();

        for (int i = 0; i < tokens.length; i++) {
            if (i > 0 && delimiter != null) {
                result.append(delimiter);
            }
            result.append(String.valueOf(tokens[i]));
        }
        return result.toString();
    }

}