myeclipse trial expired暂时解决办法

运行以下程序，生成key:

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, "0");    

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

                          reader.readLine();    

                      } catch (IOException ex) {    

                      }    

                  }    

              }