import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
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, "5");
        System.out.println("Serial:" + res);
        reader.readLine();
     } catch (IOException ex) {
     }
}
}