运行下面代码，然后控制台提示：please input register name:
录入名称按回车即可得到序列号。
最后进入window->prefences->MyEclipse->Subscription,录入名称和序列号即可。
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) {
   }
}
}

下面是9.0版本的一些注册码，只要在Window-Preferences-MyEclipse-subscription-Enter subscription中录入用户名和注册码即可。
用户名 51buyhost

注册码 0LR8ZC-855444-6867865683027258

激活码

24087b207716dd1fff1ee022ad5d84acb85eafe001bfcc93d45689b432e3aa74cb09d268178e21ee09e3139e247791ba9de60482f721bf8f4cad19d62d4b954b47d488c2ddea351db59780f7ebf2f63915b6ade6ad1ac3c21f2b2b62bd6b823e347da31f22d35a3fd57f062bbe4e07240c72a3dd40fca1d41399deb90f65a320





用户名 myeclipse

注册码 zLR8ZC-855444-6867865186893497

激活码 34e21789e31319750707455179fe715066be187037b34202478760439e31a100fefd1c2bd606551d4059ec53a88e1c3c1160b6a47f9efaa292c7bfa74e806bfcd0dab873866a0e8c5d45db2bd8e0ee5ef3ab113504d81cdc2b1f608bdc97b21d520dfc15bda34af72bfda52bfb3a00a3e9d85536bb658e7bdad2c61c3415e4ff







用户名 java

注册码 wLR8ZC-855444-68678656924678807

激活码5680c651eff3f60f66d1328b629b81e9c193898296ba4ca2f082a9fe5919e85624df7cf29de534142521dee0b5bffcd457712d34982569049e1ac0e630365c674943b33d65dfb71687ebb310a34d85b7b14d6f3bd5b9fa699f0d16e9fe7519ce9a43e7ddbb7df026b0cba4342d924ecbd33b786f7b8104ad1331d5d1af7b759c