MyEclipse作为Eclipse IDE的扩展，深受广大开发者所喜爱，国内的朋友对MyEclipse都是非常熟悉的了，现在做JAVA开发的基本都采用她了，JBuilder已不是很多人记得和使用了。MyEclipse 7.5发布于2009年6月，想当年也是红极一时，现在也有一些朋友在用，当然很多朋友都会用最新版本，而mark是不会忘记MyEclipse 7.5的，因为她为ajava.org网站带来不少的流量。
那个年头，MyEclipse的下载已是一个麻烦事，国内朋友只能表示无奈，同时注册也是个麻烦事，以前ajava.org对每个版本的MyEclipse都提供了相应的注册码，现在不知道还可不可以使用，反证mark没保留，于是使用了下面的方法来注册，那我们一步一步来注册吧。
代码如下：
package cn.will.myeclipse;
import java.io.*;
public class MyEclipseRegister {
??? 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 MyEclipseRegister() {
??????? 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();
??????????? MyEclipseRegister myeclipsegen = new MyEclipseRegister();
??????????? String res = myeclipsegen.getSerial(userId, "20");
??????????? System.out.println("Serial:" + res);
??????????? reader.readLine();
??????? } catch (IOException ex) {
??????? }
??? }
}
?
2.点MyEclipse上面的运行“Run As...”
通过上面几步，注册工作已完成，现在查看MyEclipse-->Subscription Information,会发现注册信息全部显示出来，我的使用期限为3年，2014-12-17日止。
，这时候查看MyEclipse-->Subscription Information会发现注册信息是空，表示你还没有注册。
