Java Hash Code Calculate hashCode(Iterable iterable)

Description

Generates a Object#hashCode() for a given Iterable and its elements.

License

Apache License

Parameter

Parameter	Description
iterable	a parameter

Declaration

public static int hashCode(Iterable<?> iterable) 

Method Source Code

//package com.java2s;
/*******************************************************************************
 * Copyright 2011 Danny Kunz/*w ww . ja  v  a2  s . com*/
 * 
 * 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 {
    /**
     * Generates a {@link Object#hashCode()} for a given {@link Iterable} and its elements. The hash code respects the hash codes of
     * the element instances and their order.
     * 
     * @param iterable
     * @return
     */
    public static int hashCode(Iterable<?> iterable) {
        final int prime = 31;
        int result = 1;
        if (iterable != null) {
            for (Object object : iterable) {
                result = prime * result + ((object == null) ? 0 : object.hashCode());
            }
        }
        return result;
    }
}

Related

1. hashCode(int val)
2. hashCode(int[] a)
3. hashCode(int[] ai)
4. hashCode(int[] array)
5. hashCode(int[][] arrays)
6. hashCode(long a[])
7. hashCode(long longVal)
8. hashCode(long value)
9. hashCode(long x)