myeclipse注册码的通用算法

还不错，所有版本都通用。

import java.io.*;
public class Crack {
   public static String convert(String s) {
       if (s == null || s.length() == 0)
           return s;
       byte abyte0[] = s.getBytes();
       char ac[] = new char[s.length()];
       int i = 0;
       for (int k = abyte0.length; i < k; i++) {
           int j = abyte0[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;
           ac[i] = (char) j;
       }
       return String.valueOf(ac);
   }

   private static int hash(String s) {
       int i = 0;
       char ac[] = s.toCharArray();
       int j = 0;
       for (int k = ac.length; j < k; j++)
           i = 31 * i + ac[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("My Eclipse IDE v9.99 Keygen");
           System.out.print("License Name : ");
           String s = inputString();
           String licStr = "YE3MP-999-00-9912310";
           String h = s.substring(0, 1)
                   + licStr
                   + "Decompiling this copyrighted software is a violation of both your license agreement and the Digital Millenium Copyright Act of 1998 (http://www.loc.gov/copyright/legislation/dmca.pdf). Under section 1204 of the DMCA, penalties range up to a $500,000 fine or up to five years imprisonment for a first offense. Think about it; pay for a license, avoid prosecution, and feel better about yourself."
                   + 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();
       }
   }
}