Java Hash Code Calculate hashCode(int[] array)

Description

Returns a hash code value for the array

License

Open Source License

Parameter

Parameter	Description
array	the array to create a hash code value for

Return

a hash code value for the array

Declaration

static int hashCode(int[] array) 

Method Source Code

//package com.java2s;
/**/*from   w w  w.  ja v  a 2 s  . com*/
 * Copyright (c) 2006-2011 Floggy Open Source Group. 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.
 */

public class Main {
    /**
    * Returns a hash code value for the array
    *
    * @param array the array to create a hash code value for
    *
    * @return a hash code value for the array
    */
    static int hashCode(int[] array) {
        final int prime = 31;

        if (array == null)
            return 0;

        int result = 1;

        for (int index = 0; index < array.length; index++) {
            result = (prime * result) + array[index];
        }

        return result;
    }

    /**
    * Returns a hash code value for the array
    *
    * @param array the array to create a hash code value for
    *
    * @return a hash code value for the array
    */
    static int hashCode(Object[] array) {
        final int prime = 31;

        if (array == null)
            return 0;

        int result = 1;

        for (int index = 0; index < array.length; index++) {
            result = (prime * result) + ((array[index] == null) ? 0 : array[index].hashCode());
        }

        return result;
    }
}

Related

1. hashCode(int previous, boolean x)
2. hashCode(int result, Object obj)
3. hashCode(int val)
4. hashCode(int[] a)
5. hashCode(int[] ai)
6. hashCode(int[][] arrays)
7. hashCode(Iterable iterable)
8. hashCode(long a[])
9. hashCode(long longVal)