MyEclipse5.0注册码算法

import java.io.*;

public class Crack
{
        public static String convert(String s)
           {
                if (s == null || s.length() == 0)
                        return s;
                byte[] byteArray = s.getBytes();
                char[] charArray = new char[s.length()];

                int byteArrayLength = byteArray.length;

                for (int i = 0; i < byteArrayLength; i++)
                   {
                        int j = byteArray[i];
                        if (j >= 48 && j <= 57)
                                   j = ((j - 48) + 5) % 10 + 48;
                        else if (j >= 65 && j <= 90)
                                   j = ((j - 65) + 13) % 26 + 65;
                        else if (j >= 97 && j <= 122)
                                   j = ((j - 97) + 13) % 26 + 97;
                           charArray[i] = (char) j;
                   }

                return String.valueOf(charArray);
           }

        private static int hash(String s)
           {
                int i = 0;
                char charArray[] = s.toCharArray();
                int charArrayLength = charArray.length;
                for (int j = 0; j < charArrayLength; j++)
                           i = 31 * i + charArray[j];

                return Math.abs(i);
           }

        private static String inputString()
           {
                   BufferedReader bufferedreader = new BufferedReader(new InputStreamReader(System.in));
                   String s = null;
                try
                   {
                           s = bufferedreader.readLine();
                   }
                catch (IOException ioexception)
                   {
                           ioexception.printStackTrace();
                   }
                return s;
           }

        public static void main(String args[])
           {
                try
                   {
                           System.out.println("MyEclipse Enterprise Workbench 5.0 Keygen");
                           System.out.print("License Name : ");
                           String s = inputString();
                           String licStr = "YE3MP-999-00-9912310";
                           String h = s.substring(0, 1) + licStr + s;
                        int j = hash(h);
                           String lic = s.substring(0, 1) + licStr + Integer.toString(j);
                           System.out.println("License Key : " + convert(lic));
                   }
                catch (Exception exception)
                   {
                           exception.printStackTrace();
                   }
           }
}