decode Base37 - Java java.lang

Java examples for java.lang:long

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Description

decode Base37

Demo Code

/**/*from  w  w w  .jav  a  2 s . c  om*/
 * Copyright (c) 2014 Virtue Studios
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
//package com.java2s;

public class Main {
    public static void main(String[] argv) throws Exception {
        long value = 2;
        System.out.println(decodeBase37(value));
    }

    public static String decodeBase37(long value) {
        char[] chars = new char[12];
        int pos = 0;
        while (value != 0) {
            int remainder = (int) (value % 37);
            value /= 37;

            char c;
            if (remainder >= 1 && remainder <= 26)
                c = (char) ('a' + remainder - 1);
            else if (remainder >= 27 && remainder <= 36)
                c = (char) ('0' + remainder - 27);
            else
                c = '_';

            chars[chars.length - pos++ - 1] = c;
        }
        return new String(chars, chars.length - pos, pos);
    }
}

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