Here you can find the source of convertLongArrayToString(long[] value, String separator)
public static String convertLongArrayToString(long[] value, String separator)
//package com.java2s; //License from project: Open Source License public class Main { public static String convertLongArrayToString(long[] value, String separator) { if (value.length == 0) { return ""; }/* w w w . ja va2s.co m*/ StringBuilder sb = new StringBuilder(); for (long v : value) { sb.append(v); sb.append(separator); } sb.setLength(sb.length() - separator.length()); return sb.toString(); } }