package cc.dfsoft.cc;
import java.io.BufferedReader; 
import java.io.IOException; 
import java.io.InputStreamReader; 
 
public class MyEclipseKeyGen { 
    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 MyEclipseKeyGen() { 
        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(); 
            MyEclipseKeyGen myeclipsekeygen = new MyEclipseKeyGen(); 
            String res = myeclipsekeygen.getSerial(userId, "5"); 
            System.out.println("Serial:" + res); 
            reader.readLine(); 
        } catch (IOException ex) { 
        } 
    } 
}