怎样获取MyEclipse的注册码9.0之前不包括9.0

import java.text.DecimalFormat;     
import java.text.NumberFormat;     
import java.text.SimpleDateFormat;     
import java.util.Calendar;     
    
public class getMyEclipseCode {    
 
    public static final void main(String[] args){  
     
        String id="用户名";     
        String num="(1-999的三位数字)";     
        
        System.out.println(getSerial(id,"100",num,false));     
       
    }     
   
    public static String getSerial(String userId, String version,     
            String licenseNum, boolean selected) {     
        Calendar cal = Calendar.getInstance();     
        cal.add(1, 3);     
        cal.add(6, -1);     
        NumberFormat nf = new DecimalFormat("000");     
        licenseNum = nf.format(Integer.valueOf(licenseNum));     
        String verTime = selected ? (new StringBuffer("-")).append(     
                (new SimpleDateFormat("yyMMdd")).format(cal.getTime())).append(     
                "0").toString() : "-1012310";     
        String type = "YE3MB-";     
        String need = (new StringBuffer(String.valueOf(userId.substring(0, 1))))     
                .append(type).append(version).append(licenseNum)     
                .append(verTime).toString();     
        String dx = (new StringBuffer(String.valueOf(need)))     
                .append(     
                        "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.")     
                     
                        .append(userId).toString();     
        int suf = decode(dx);     
        String code = (new StringBuffer(String.valueOf(need))).append(     
                String.valueOf(suf)).toString();     
        return change(code);     
    }     
    
    private static int decode(String s) {     
        int i = 0;     
        char ac[] = s.toCharArray();     
        int j = 0;     
        for (int k = ac.length; j < k; j++)     
            i = 31 * i + ac[j];     
    
        return Math.abs(i);     
    }     
    
    private static String change(String s) {     
        byte abyte0[] = s.getBytes();     
        char ac[] = new char[s.length()];     
        int i = 0;     
        for (int k = abyte0.length; i < k; i++) {     
            int 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;     
        }     
    
        return String.valueOf(ac);     
    }     
}