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刚刚发现MyEclipse7.5过期了，需要注册，然后在网上找了几个注册码，发现每当输入用户名和密码的时候，下面 完成 的按钮式禁用的，然后网上查找了一下原因，说是需要写入  Subscriber 和 Subscription Code   还有Subscription Detail 但是最后一个无法进行键盘输入，应该是自动生成的，继续查找原因，发现找到一个好用的代码生成注册码的方法，运行后会输入注册码，再次根据注册名和注册码进行注册Ok

import java.text.DecimalFormat;
import java.text.NumberFormat;
import java.text.SimpleDateFormat;
import java.util.Calendar;
/**
* myeclipse blue 7.5 keygen
* @author Administrator
*/
public class Test {
public static final void main(String[] args) {
  String id = "hf"; // 可更给为您的名字也就是你的注册名称
  String num = "999";// 许可证数量
  System.out.println(getSerial(id, "100", num, true));
}
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);
}

}