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) {       }    }    } 

please input register name: ×××××（输入你的name,随便什么） 即生成序列号： ××××× ××××× ×××××...