Java tutorial
//package com.java2s; //License from project: Apache License public class Main { public static String join(int... array) { StringBuilder sb = new StringBuilder(); for (int i = 0; i < array.length; i++) { sb.append(array[i]); if (i < array.length - 1) sb.append(','); } return sb.toString(); } public static String join(long... array) { StringBuilder sb = new StringBuilder(); for (int i = 0; i < array.length; i++) { sb.append(array[i]); if (i < array.length - 1) sb.append(','); } return sb.toString(); } }