Here you can find the source of combine(byte[] one, byte[] two, byte[] three, byte[] four)
public static byte[] combine(byte[] one, byte[] two, byte[] three, byte[] four)
//package com.java2s; /**//from w w w. ja v a2s. c o m * Copyright (C) 2013 Open WhisperSystems * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU Affero 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 Affero General Public License for more details. * * You should have received a copy of the GNU Affero General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ public class Main { public static byte[] combine(byte[] one, byte[] two, byte[] three, byte[] four) { byte[] combined = new byte[one.length + two.length + three.length + four.length]; System.arraycopy(one, 0, combined, 0, one.length); System.arraycopy(two, 0, combined, one.length, two.length); System.arraycopy(three, 0, combined, one.length + two.length, three.length); System.arraycopy(four, 0, combined, one.length + two.length + three.length, four.length); return combined; } }