Here you can find the source of toBase64(int x)
public static String toBase64(int x)
//package com.java2s; /*/* www . j a v a 2 s .com*/ * jIRCd - Java Internet Relay Chat Daemon * Copyright 2003 Tyrel L. Haveman <tyrel@haveman.net> * * This file is part of jIRCd. * * jIRCd is free software; you can redistribute it and/or modify it under * the terms of the GNU General Public License as published by the Free * Software Foundation; either version 2 of the License, or (at your option) * any later version. * * jIRCd is distributed in the hope that it will be useful, but WITHOUT ANY * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more * details. * * You should have received a copy of the GNU General Public License along * with jIRCd; if not, write to the Free Software Foundation, Inc., * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * */ public class Main { private static final char[] encodeLookup = new char[] { 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '[', ']' }; public static String toBase64(int x) { char[] b64 = new char[6]; b64[5] = encodeLookup[x & 63]; x >>>= 6; b64[4] = encodeLookup[x & 63]; x >>>= 6; b64[3] = encodeLookup[x & 63]; x >>>= 6; b64[2] = encodeLookup[x & 63]; x >>>= 6; b64[1] = encodeLookup[x & 63]; x >>>= 6; b64[0] = encodeLookup[x & 63]; return new String(b64); } }