HashUtil.java

package org.dicadeveloper.weplantaforest.common.testSupport;

public class HashUtil {

    public static String samehash(String string, int level) {
        if (string.length() < 2){
            return string;            
        }

        String stringWithSameHash;
        String sub2 = string.substring(0, 2);
        char c0 = sub2.charAt(0);
        char c1 = sub2.charAt(1);
        c0 = (char) (c0 + level);
        c1 = (char) (c1 - 31 * level);
        String newsub2 = new String(new char[] { c0, c1 });
        stringWithSameHash = newsub2 + string.substring(2);
        return stringWithSameHash;
    }
}