其实5.5算号器的的源代码并没有多大改变，自己看看就清除了！
import java.io.*;
/**//*5.5.x GA算号源代码*/
public class Crack 
{
public static String convert(String s) {
if (s == null || s.length() == 0)
return 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);
}
private static int hash(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 inputString() {
BufferedReader bufferedreader = new BufferedReader(
new InputStreamReader(System.in));
String s = null;
try {
s = bufferedreader.readLine();
} catch (IOException ioexception) {
ioexception.printStackTrace();
}
return s;
}
public static void main(String args[]) {
try {
System.out.println("My Eclipse IDE vxx.xx Keygen");
System.out.print("License Name : ");
String s = inputString();
// 程序关键代码：
String licStr = "YE3MP-100000-0912310";
String h = s.substring(0, 1)
+ licStr
+ "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."
+ s;
int j = hash(h);
String lic = s.substring(0, 1) + licStr + Integer.toString(j);
System.out.println("License Key : " + convert(lic));
} catch (Exception exception) {
exception.printStackTrace();
}
}
}
看看代码，其实只有licStr这部分变了：
5.5.x GA版的：
String licStr = "YE3MP-100000-0912310";
5.1.x 以前的：
String licStr = "YE3MP-501-00-0912310";
看出来了吧，只是很小的改动！
这段代码的解释：（5.5.x GA）
E3MP 表示pro版，E2MY 表示standard版；
100000 前面100表示版本号，后面000为使用人数，可以随便填，默认000为Ultimate；
091231 表示使用到期时间为：2009-12-31，这个已经是最大期限了，不能再改大了！