Here you can find the source of toUnsignedInt(byte b1, byte b2, byte b3, byte b4)
public static long toUnsignedInt(byte b1, byte b2, byte b3, byte b4)
//package com.java2s; /*/*from w w w . ja va 2 s. c o m*/ * Copyright (C) 2011 Life Technologies Inc. * * 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 2 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 long toUnsignedInt(byte b1, byte b2, byte b3, byte b4) { return ((b1 & 0xFF) | ((b2 & 0xFF) << 8) | ((b3 & 0xFF) << 16) | ((b4 & 0xFF) << 24)) & 0xFFFFFFFFl; } }