制作MyEclipse序列号

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1、建立java Project，任意取个名字就行。

2、建立一个名字为MyEclipseGen的类文件，内容见附件。

3、运行该代码，在控制台中会出现：

please input register name:

please input register name:
×××××（你的name）
即生成序列号：
4、进入myeclipse,输入Subscriber和Subscription code即可。

其源码如下：

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, "20");
         System.out.println("Serial:" + res); 
         reader.readLine();
             } catch (IOException ex){}
        }
  }