get String BKDR Hash - Java java.lang

Java examples for java.lang:String Hash

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Description

get String BKDR Hash

Demo Code

/*/*from   w  w  w.  jav a  2  s. co m*/
 * 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.
 */
//package com.java2s;

public class Main {
    public static void main(String[] argv) throws Exception {
        String key = "java2s.com";
        System.out.println(getBKDRHash(key));
    }

    public static long getBKDRHash(String key) {
        long hash = 0;
        int seed = 131; // 31 131 1313 13131 131313 etc..
        for (int i = 0; i < key.length(); i++) {
            hash = hash * seed + key.charAt(i);
        }
        return hash;
    }
}

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