Java Hash Calculate hash(byte[] data)

Description

Generate a hash for a byte array using a 32-bit FNV-1a hash.

License

Apache License

Parameter

Parameter	Description
data	The array to hash.

Return

The hash for the data.

Declaration

public static int hash(byte[] data) 

Method Source Code

//package com.java2s;
/*/*w  w w.j  a v a2s .  c  o m*/
 * Licensed to the Warcraft4J Project under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The Warcraft4J Project 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.
 */

public class Main {
    /**
     * Generate a hash for a byte array using a 32-bit FNV-1a hash.
     *
     * @param data The array to hash.
     *
     * @return The hash for the data.
     */
    public static int hash(byte[] data) {
        if (data == null || data.length == 0) {
            return 0;
        }
        long hash = 2166136261L;
        for (byte b : data) {
            hash ^= b;
            hash *= 16777619L;
        }
        return (int) hash;
    }
}

Related

1. hash(boolean value, int seed)
2. hash(boolean[] array)
3. hash(byte x)
4. hash(byte[] bytes)
5. hash(byte[] bytes)
6. hash(byte[] digest, int number)
7. hash(char[] str, int start, int length)
8. hash(double value)
9. hash(final boolean value)