Java Hash String hashCode(String str)

Description

Computes a hash code for a string.

License

Apache License

Parameter

Parameter	Description
str	the string for which to compute the hashcode

Return

hashcode of the string

Declaration

public static int hashCode(String str) 

Method Source Code

//package com.java2s;
/*//from w  ww .jav  a2s .c  om
 *  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.
 */

public class Main {
    /**
     * Computes a hash code for a string. The purpose of this hashcode is to be constant independently of
     * the JDK being used.
     * @param str the string for which to compute the hashcode
     * @return hashcode of the string
     */
    public static int hashCode(String str) {
        final char[] chars = str.toCharArray();
        int h = 0;
        for (int i = 0; i < chars.length; i++) {
            h = 31 * h + chars[i];
        }
        return h;
    }
}

Related

1. hashArrayToString(int a[])
2. hashbang(final String historyToken)
3. hashcode(String name)
4. hashCode(String s)
5. hashCode(String sIn)
6. hashCode1(String str)
7. hashCode2(String str)
8. hashCode64(String s)
9. hashCode64(String s)