myeclipse6.5注册机

import java.io.*;


public class MyEclipseGen {    
    private static final String LL = "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.";    
   
    public String getSerial(String userId, String licenseNum) {    
        java.util.Calendar cal = java.util.Calendar.getInstance();    
        cal.add(1, 3);    
        cal.add(6, -1);    
        java.text.NumberFormat nf = new java.text.DecimalFormat("000");    
        licenseNum = nf.format(Integer.valueOf(licenseNum));    
        String verTime = new StringBuilder("-").append(    
                new java.text.SimpleDateFormat("yyMMdd").format(cal.getTime()))    
                .append("0").toString();    
        String type = "YE3MP-";    
        String need = new StringBuilder(userId.substring(0, 1)).append(type)    
                .append("300").append(licenseNum).append(verTime).toString();    
        String dx = new StringBuilder(need).append(LL).append(userId)    
                .toString();    
        int suf = this.decode(dx);    
        String code = new StringBuilder(need).append(String.valueOf(suf))    
                .toString();    
        return this.change(code);    
    }    
   
    private int decode(String s) {    
        int i;    
        char[] ac;    
        int j;    
        int k;    
        i = 0;    
        ac = s.toCharArray();    
        j = 0;    
        k = ac.length;    
        while (j < k) {    
            i = (31 * i) + ac[j];    
            j++;    
        }    
        return Math.abs(i);    
    }    
   
    private String change(String s) {    
        byte[] abyte0;    
        char[] ac;    
        int i;    
        int k;    
        int j;    
        abyte0 = s.getBytes();    
        ac = new char[s.length()];    
        i = 0;    
        k = abyte0.length;    
        while (i < k) {    
            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;    
            i++;    
        }    
        return String.valueOf(ac);    
    }    
   
    public MyEclipseGen() {    
        super();    
    }    
   
    public static void main(String[] args) {    
        try {    
            System.out.println("please input register name:");    
            BufferedReader reader = new BufferedReader(new InputStreamReader(    
                    System.in));    
            String userId = null;    
            userId = reader.readLine();    
            MyEclipseGen myeclipsegen = new MyEclipseGen();    
            String res = myeclipsegen.getSerial(userId, "20");    
            System.out.println("Serial:" + res);    
            reader.readLine();    
        } catch (IOException ex) {    
        }    
    }    
}