JAVA高级面试进阶训练营视频教程

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一般myeclise使用期限为30天，超过之后，会频繁的提醒你，购买软件，很讨厌，有个这个小工具，，以后再也不怕啦！！！

使用方法：

1：将这个类导入到myeclipse包中

2：运行main方法，提示输入注册用户名：随便输入，然后回车

生成序列号，

3：然后将用户名和序列号填入菜单栏myeclipse——subscription information（订购信息），ok了

 

工具代码如下：

 1 package day01;
 2 import java.io.BufferedReader;
 3 import java.io.IOException;
 4 import java.io.InputStreamReader;
 5 
 6 public class MyEclipseGen {
 7     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.";
 8 
 9     public String getSerial(String userId, String licenseNum) {
10         java.util.Calendar cal = java.util.Calendar.getInstance();
11         cal.add(1, 3);
12         cal.add(6, -1);
13         java.text.NumberFormat nf = new java.text.DecimalFormat("000");
14         licenseNum = nf.format(Integer.valueOf(licenseNum));
15         String verTime = new StringBuilder("-").append(
16                 new java.text.SimpleDateFormat("yyMMdd").format(cal.getTime()))
17                 .append("0").toString();
18         String type = "YE3MP-";
19         String need = new StringBuilder(userId.substring(0, 1)).append(type)
20                 .append("300").append(licenseNum).append(verTime).toString();
21         String dx = new StringBuilder(need).append(LL).append(userId)
22                 .toString();
23         int suf = this.decode(dx);
24         String code = new StringBuilder(need).append(String.valueOf(suf))
25                 .toString();
26         return this.change(code);
27     }
28 
29     private int decode(String s) {
30         int i;
31         char[] ac;
32         int j;
33         int k;
34         i = 0;
35         ac = s.toCharArray();
36         j = 0;
37         k = ac.length;
38         while (j < k) {
39             i = (31 * i) + ac[j];
40             j++;
41         }
42         return Math.abs(i);
43     }
44 
45     private String change(String s) {
46         byte[] abyte0;
47         char[] ac;
48         int i;
49         int k;
50         int j;
51         abyte0 = s.getBytes();
52         ac = new char[s.length()];
53         i = 0;
54         k = abyte0.length;
55         while (i < k) {
56             j = abyte0;
57             if ((j >= 48) && (j <= 57)) {
58                 j = (((j - 48) + 5) % 10) + 48;
59             } else if ((j >= 65) && (j <= 90)) {
60                 j = (((j - 65) + 13) % 26) + 65;
61             } else if ((j >= 97) && (j <= 122)) {
62                 j = (((j - 97) + 13) % 26) + 97;
63             }
64             ac = (char) j;
65             i++;
66         }
67         return String.valueOf(ac);
68     }
69 
70     public MyEclipseGen() {
71         super();
72     }
73 
74     public static void main(String[] args) {
75         try {
76             System.out.println("please input register name:");
77             BufferedReader reader = new BufferedReader(new InputStreamReader(
78                     System.in));
79             String userId = null;
80             userId = reader.readLine();
81             MyEclipseGen myeclipsegen = new MyEclipseGen();
82             String res = myeclipsegen.getSerial(userId, "5");
83             System.out.println("Serial:" + res);
84             reader.readLine();
85         } catch (IOException ex) {
86         }
87     }
88 
89 }