myeclipse 代码

package com.linyo.cpsad.test;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
public class aaa {
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 aaa() {
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();
aaa myeclipsegen = new aaa();
String res = myeclipsegen.getSerial(userId, "5");
System.out.println("Serial:" + res);
reader.readLine();
} catch (IOException ex) {
}
}
}