Here you can find the source of unsign(byte b)
public static short unsign(byte b)
//package com.java2s; /*-/*from w w w .ja v a 2 s . co m*/ * Copyright (C) 2006-2007 Erik Larsson * * This program 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 3 of the License, or * (at your option) any later version. * * This program 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 this program. If not, see <http://www.gnu.org/licenses/>. */ public class Main { public static short unsign(byte b) { return (short) (b & 0xFF); } public static int unsign(short s) { return s & 0xFFFF; } public static long unsign(int i) { return i & 0xFFFFFFFFL; } }