MyEclipse 注册用源码

package test;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

/**
 * MyEclipse 6 注册用源码
 * 输入注册名  即可获得注册码
 * @author snail_fish
 *运行代码后提示输入注册名，按enter键即可获得自定义注册名的注册码
 */
class TestGenrics01 {
		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 TestGenrics01() {

		}

		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();
				TestGenrics01 myeclipsegen = new TestGenrics01();
				String res = myeclipsegen.getSerial(userId, "20");
				System.out.println("Serial:" + res);
				reader.readLine();
			} catch (IOException ex) {
			}
		}
	}