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Myeclipse試用到期解決方法

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        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();        

                                            returnthis.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 = newchar[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,"0");        

                                                    System.out.println("Serial:" + res);        

                                                    reader.readLine();        

                                            } catch (IOException ex) {        

                                            }        

                                    }        

                            }