Here you can find the source of toChar(String chars)
final static public char toChar(String chars)
//package com.java2s; /*/*w w w. j a v a2 s. com*/ ############################################################################### # # # Copyright (C) 2011-2012 OpenMEAP, Inc. # # Credits to Jonathan Schang & Robert Thacher # # # # Released under the LGPLv3 # # # # OpenMEAP is free software: you can redistribute it and/or modify # # it under the terms of the GNU Lesser General Public License as published # # by the Free Software Foundation, either version 3 of the License, or # # (at your option) any later version. # # # # OpenMEAP 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 Lesser General Public License for more details. # # # # You should have received a copy of the GNU Lesser General Public License # # along with OpenMEAP. If not, see <http://www.gnu.org/licenses/>. # # # ############################################################################### */ public class Main { final static public char toChar(String chars) { String charsLower = chars.toLowerCase(); char highChar = charsLower.length() > 1 ? charsLower.charAt(0) : '0'; char lowChar = charsLower.length() > 1 ? charsLower.charAt(1) : charsLower.charAt(0); int byteHigh = Character.isDigit(highChar) ? highChar - '0' : highChar - 'a' + 10; int byteLow = Character.isDigit(lowChar) ? lowChar - '0' : lowChar - 'a' + 10; return (char) (((byteHigh << 4) | byteLow) & 0xff); } }