my eclipse激活代码

package com.zsy.test;

import java.io.*;
import java.text.*;
import java.util.Calendar;

public class Myeclipse_KeyMaker {

	public Myeclipse_KeyMaker() {
	}

	public static void main(String args[]) {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		String userId = null;
		int intLicenseNum = 1;
		String strLicenseNum = null;
		boolean bProFlag = true;
		String strProFlag = null;
		while (userId == null || "".equals(userId.trim())) {
			System.out.print("Subscriber: ");
			try {
				userId = br.readLine();
			} catch (IOException ioexception) {
			}
		}

		System.out.print("Number of licenses(default 1, max 999): ");
		try {
			strLicenseNum = br.readLine();
		} catch (IOException ioexception1) {
		}
		NumberFormat nf = new DecimalFormat("000");
		if (strLicenseNum == null || "".equals(strLicenseNum.trim()))
			strLicenseNum = nf.format(intLicenseNum);
		else
			strLicenseNum = nf.format(Integer.parseInt(strLicenseNum));
		System.out.print("Professional or Standard(default pro, n=stand): ");
		try {
			strProFlag = br.readLine();
		} catch (IOException ioexception2) {
		}
		if (strProFlag != null && !"".equals(strProFlag.trim()))
			bProFlag = false;
		Calendar cal = Calendar.getInstance();
		cal.add(1, 2);
		cal.add(6, -1);
		SimpleDateFormat sdf = new SimpleDateFormat("yyMMdd");
		String need = userId.substring(0, 1) + "Y"
				+ (bProFlag ? "E3MP" : "E2MY") + "-100" + strLicenseNum + "-"
				+ sdf.format(cal.getTime()) + "0";
		String dx = need
				+ "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."
				+ userId;
		int suf = decode(dx);
		String code = need + suf;
		System.out.println("Subscription Code: " + change(code));
	}

	static int decode(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);
	}

	static String change(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);
	}
}