Here you can find the source of toHex(char c)
private static String toHex(char c)
//package com.java2s; /*//from ww w . j a v a2s . c o m * StringUtil.java * * Copyright (C) 2009-12 by RStudio, Inc. * * Unless you have received this program directly from RStudio pursuant * to the terms of a commercial license agreement with RStudio, then * this program is licensed to you under the terms of version 3 of the * GNU Affero General Public License. This program is distributed WITHOUT * ANY EXPRESS OR IMPLIED WARRANTY, INCLUDING THOSE OF NON-INFRINGEMENT, * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Please refer to the * AGPL (http://www.gnu.org/licenses/agpl-3.0.txt) for more details. * */ public class Main { private static String toHex(char c) { String table = "0123456789ABCDEF"; return table.charAt((c >> 8) & 0xF) + "" + table.charAt(c & 0xF); } }