Java Byte Array Equal bytesEqual(byte[] a, byte[] b)

Description

Compares two byte arrays for equality.

License

Open Source License

Declaration

public static boolean bytesEqual(byte[] a, byte[] b) 

Method Source Code

//package com.java2s;
/*//from ww  w.  ja  v a2 s.co  m
 *
 *
 * Copyright  1990-2006 Sun Microsystems, Inc. All Rights Reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
 * 
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License version
 * 2 only, as published by the Free Software Foundation. 
 * 
 * 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 version 2 for more details (a copy is
 * included at /legal/license.txt). 
 * 
 * You should have received a copy of the GNU General Public License
 * version 2 along with this work; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA 
 * 
 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
 * Clara, CA 95054 or visit www.sun.com if you need additional
 * information or have any questions. 
 */

public class Main {
    /**
     * Compares two byte arrays for equality.
     */
    public static boolean bytesEqual(byte[] a, byte[] b) {
        if (a == b) {
            // handles null == null
            return true;
        }

        if (a == null || b == null) {
            return false;
        }

        // a and b both non-null

        if (a.length != b.length) {
            return false;
        }

        for (int i = 0; i < a.length; i++) {
            if (a[i] != b[i]) {
                return false;
            }
        }

        return true;
    }

    /**
     * Compares a subrange of byte array a to the entirety of b.
     */
    public static boolean bytesEqual(byte[] a, int off, int len, byte[] b) {
        byte[] sub = new byte[len];
        System.arraycopy(a, off, sub, 0, len);
        return bytesEqual(sub, b);
    }
}

Related

1. byteArrayEquals(byte[] a1, byte[] a2)
2. byteArrayEquals(byte[] b1, byte[] b2)
3. byteArrayEquals(final byte[] actual, final byte[] expected)
4. byteArrayEquals(final byte[] lhs, final byte[] rhs)
5. byteArraysEqual(byte[] b1, byte[] b2)
6. bytesEqual(byte[] a, byte[] b, int len)
7. bytesEqual(byte[] a, int aFrom, int aLen, byte[] b, int bFrom, int bLen)
8. bytesEqual(byte[] a, int aOff, byte[] b, int bOff, int len)
9. bytesEqual(byte[] a1, byte[] a2)