在MyEclipse中新建一个Java类，名为MyEclipseKeyGen，将下面的Java代码拷贝到MyEclipseKeyGen类中，先修改变量subscriber的值，然后运行程序即可获得Subscription Code。将subscriber和subscriptionCode输入上图所示区域，点击“OK”，即可激活MyEclipse6.5（通过测试，本人已成功激活）。其他的MyEclipse版本暂没有测试过。
1 import java.text.DecimalFormat;
2 import java.text.NumberFormat;
3 import java.text.SimpleDateFormat;
4 import java.util.Calendar;
5
6 public class MyEclipseKeyGen {
7
8 public static final void main(String[] args){
9 String subscriber = "yuxinwangjing"; //subscriber
10 String licenseNum = "500"; //Number of Licenses
11 String version = "100"; //版本号
12 String subscriptionCode = getSubscriptionCode(subscriber, version , licenseNum ,true);
13 System.out.println(subscriptionCode);
14 }
15
16 public static String getSubscriptionCode(String subscriber, String version, String licenseNum, boolean selected) {
17 Calendar cal = Calendar.getInstance();
18 cal.add(1, 3); //年份加三年
19 cal.add(6, -1); //日期减一,当前日期20141226，到期日期则为20171225
20 NumberFormat nf = new DecimalFormat("000");
21 licenseNum = nf.format(Integer.valueOf(licenseNum));
22 String verTime = selected ? (new StringBuffer("-")).append((new SimpleDateFormat("yyMMdd")).format(cal.getTime())).append("0").toString() : "-0812310";
23 String type = "YE3MB-";
24 String need = (new StringBuffer(String.valueOf(subscriber.substring(0,1)))).append(type).append(version).append(licenseNum).append(verTime).toString();
25 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(subscriber).toString();
26 int suf = decode(dx);
27 String code = (new StringBuffer(String.valueOf(need))).append(String.valueOf(suf)).toString();
28 return change(code);
29 }
30
31 private static int decode(String s) {
32
33 int i = 0;
34 char ac[] = s.toCharArray();
35 int j = 0;
36 for (int k = ac.length; j < k; j++)
37 i = 31 * i + ac[j];
38 return Math.abs(i);
39 }
40
41 private static String change(String s) {
42 byte abyte0[] = s.getBytes();
43 char ac[] = new char[s.length()];
44 int i = 0;
45 for (int k = abyte0.length; i < k; i++) {
46 int j = abyte0[i];
47 if (j >= 48 && j <= 57)
48 j = ((j - 48) + 5) % 10 + 48;
49 else if (j >= 65 && j <= 90)
50 j = ((j - 65) + 13) % 26 + 65;
51 else if (j >= 97 && j <= 122)
52 j = ((j - 97) + 13) % 26 + 97;
53 ac[i] = (char) j;
54 }
55 return String.valueOf(ac);
56 }
57
