Java String Descrypt decrypt(String str)

Description

Decrypts a string encrypted with encrypt.

License

Open Source License

Parameter

Parameter	Description
str	the encrypted string to decrypt

Declaration

public final static String decrypt(String str) 

Method Source Code

//package com.java2s;
/*/*from  w  ww  .j av  a2s.co m*/
 * This file is subject to the license found in LICENCE.TXT in the root directory of the project.
 * 
 * version 1.4
 */

public class Main {
    /** Array contain char conversion data */
    private final static char[] SHIFTS = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20,
            21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 114, 120, 53, 79, 96, 109, 72, 108, 70, 64, 76, 67, 116, 74,
            68, 87, 111, 52, 75, 119, 49, 34, 82, 81, 95, 65, 112, 86, 118, 110, 122, 105, 41, 57, 83, 43, 46, 102,
            40, 89, 38, 103, 45, 50, 42, 123, 91, 35, 125, 55, 54, 66, 124, 126, 59, 47, 92, 71, 115, 78, 88, 107,
            106, 56, 36, 121, 117, 104, 101, 100, 69, 73, 99, 63, 94, 93, 39, 37, 61, 48, 58, 113, 32, 90, 44, 98,
            60, 51, 33, 97, 62, 77, 84, 80, 85, 223, 225, 216, 187, 166, 229, 189, 222, 188, 141, 249, 148, 200,
            184, 136, 248, 190, 199, 170, 181, 204, 138, 232, 218, 183, 255, 234, 220, 247, 213, 203, 226, 193, 174,
            172, 228, 252, 217, 201, 131, 230, 197, 211, 145, 238, 161, 179, 160, 212, 207, 221, 254, 173, 202, 146,
            224, 151, 140, 196, 205, 130, 135, 133, 143, 246, 192, 159, 244, 239, 185, 168, 215, 144, 139, 165, 180,
            157, 147, 186, 214, 176, 227, 231, 219, 169, 175, 156, 206, 198, 129, 164, 150, 210, 154, 177, 134, 127,
            182, 128, 158, 208, 162, 132, 167, 209, 149, 241, 153, 251, 237, 236, 171, 195, 243, 233, 253, 240, 194,
            250, 191, 155, 142, 137, 245, 235, 163, 242, 178, 152 };

    /**
     * Decrypts a string encrypted with encrypt.
     * @param str the encrypted string to decrypt
     * @return
     */
    public final static String decrypt(String str) {
        if (str == null) {
            return null;
        }
        StringBuffer buf = new StringBuffer();
        for (int i = 0; i < str.length(); i++) {
            buf.append(decrypt(str.charAt(i)));
        }
        return buf.toString();
    }

    private static char decrypt(char c) {
        for (char i = 0; i < SHIFTS.length; i++) {
            if (SHIFTS[i] == c) {
                return i;
            }
        }
        throw new IllegalArgumentException("Impossible to decrypt '" + c + "'. Unhandled character.");
    }
}

Related

1. decrypt(String s, int offset)
2. decrypt(String src)
3. Decrypt(String str)
4. decrypt(String str)
5. decrypt(String str)
6. decrypt(String string)
7. decrypt(String string)
8. decrypt2(byte[] arg0, int arg1, String arg2, byte arg3)
9. decryptBytes(final byte[] b, final int i)