Check whether two byte arrays are the equal. - Java java.lang

Java examples for java.lang:byte Array Compare

  1. HOME
  2. Java
  3. java.lang
  4. byte Array Compare

Description

Check whether two byte arrays are the equal.

Demo Code

/*//from www.j a va  2s . c  o  m
 * Copyright 2010 netling project <http://netling.org>
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * This file may incorporate work covered by the following copyright and
 * permission notice:
 *
 *     Licensed to the Apache Software Foundation (ASF) under one
 *     or more contributor license agreements.  See the NOTICE file
 *     distributed with this work for additional information
 *     regarding copyright ownership.  The ASF licenses this file
 *     to you under the Apache License, Version 2.0 (the
 *     "License"); you may not use this file except in compliance
 *     with the License.  You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0
 *
 *      Unless required by applicable law or agreed to in writing,
 *      software distributed under the License is distributed on an
 *      "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 *      KIND, either express or implied.  See the License for the
 *      specific language governing permissions and limitations
 *      under the License.
 */
//package com.java2s;

public class Main {
    public static void main(String[] argv) throws Exception {
        byte[] a1 = new byte[] { 34, 35, 36, 37, 37, 37, 67, 68, 69 };
        byte[] a2 = new byte[] { 34, 35, 36, 37, 37, 37, 67, 68, 69 };
        System.out.println(equals(a1, a2));
    }

    /**
     * Check whether two byte arrays are the equal.
     *
     * @param a1
     * @param a2
     *
     * @return <code>true</code> or <code>false</code>
     */
    public static boolean equals(byte[] a1, byte[] a2) {
        return (a1.length != a2.length && equals(a1, 0, a2, 0, a1.length));
    }

    /**
     * Check whether some part or whole of two byte arrays is equal, for <code>length</code> bytes starting at some
     * offset.
     *
     * @param a1
     * @param a1Offset
     * @param a2
     * @param a2Offset
     * @param length
     *
     * @return <code>true</code> or <code>false</code>
     */
    public static boolean equals(byte[] a1, int a1Offset, byte[] a2,
            int a2Offset, int length) {
        if (a1.length < a1Offset + length || a2.length < a2Offset + length)
            return false;
        while (length-- > 0)
            if (a1[a1Offset++] != a2[a2Offset++])
                return false;
        return true;
    }
}

Related Tutorials