Concatenate two arrays to one - Java Collection Framework

Java examples for Collection Framework:Array Merge

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Description

Concatenate two arrays to one

Demo Code

/* Copyright (c) 1996-2015, OPC Foundation. All rights reserved.
   The source code in this file is covered under a dual-license scenario:
     - RCL: for OPC Foundation members in good-standing
     - GPL V2: everybody else//from  ww w  .  j  av  a 2  s .  c  o m
   RCL license terms accompanied with this source code. See http://opcfoundation.org/License/RCL/1.00/
   GNU General Public License as published by the Free Software Foundation;
   version 2 of the License are accompanied with this source code. See http://opcfoundation.org/License/GPLv2
   This source code 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.
 */
//package com.java2s;

public class Main {
    public static void main(String[] argv) throws Exception {
        byte[] chunks = new byte[] { 34, 35, 36, 37, 37, 37, 67, 68, 69 };
        System.out.println(java.util.Arrays.toString(concatenate(chunks)));
    }

    /**
     * Concatenate two arrays to one
     * @param chunks 
     * @return concatenation of all chunks
     */
    public static byte[] concatenate(byte[]... chunks) {
        int len = 0;
        for (byte[] chunk : chunks)
            len += chunk.length;
        byte result[] = new byte[len];
        int pos = 0;
        for (byte[] chunk : chunks) {
            System.arraycopy(chunk, 0, result, pos, chunk.length);
            pos += chunk.length;
        }
        return result;
    }
}

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