Java Hash Calculate hash(int val)

Description

hash

License

Open Source License

Declaration

public static int hash(int val) 

Method Source Code

//package com.java2s;
/*/*from w  w  w  .  ja  v  a  2 s. c o m*/
 * Copyright (c) 2010 Yahoo! Inc. All rights reserved.
 * 
 * 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. See accompanying LICENSE file.
 */

public class Main {
    public static final int FNV_offset_basis_32 = 0x811c9dc5;
    public static final int FNV_prime_32 = 16777619;

    public static int hash(int val) {
        return FNVhash32(val);
    }

    public static int FNVhash32(int val) {
        int hashval = FNV_offset_basis_32;

        for (int i = 0; i < 4; i++) {
            int octet = val & 0x00ff;
            val = val >> 8;

            hashval = hashval ^ octet;
            hashval = hashval * FNV_prime_32;
        }
        return Math.abs(hashval);
    }
}

Related

1. hash(int seed, boolean value)
2. hash(int seed, int i)
3. hash(int seed, int toHash)
4. hash(int seed, int val)
5. hash(int state1, int state2, int numStates1)
6. hash(int value)
7. hash(int x, int y)
8. hash(long key)
9. hash(long mover, long enemy)