……天天向上

calendar獲取當前日期及時間的用例

1. import Java.util.*;
2. 　　public class ShowDate {
3. 　　public static void main(String[] args) {
4. 　　Calendar calendar = new GregorianCalendar();
5. 　　Date trialTime = new Date();
6. 　　calendar.setTime(trialTime);
7. 　　// print out a bunch of interesting things
8. 　　System.out.println("ERA: " + calendar.get(Calendar.ERA));
9. 　　System.out.println("YEAR: " + calendar.get(Calendar.YEAR));
10. 　　System.out.println("MONTH: " + calendar.get(Calendar.MONTH));
11. 　　System.out.println("WEEK_OF_YEAR: " + calendar.get(Calendar.WEEK_OF_YEAR));
12. 　　System.out.println("WEEK_OF_MONTH: " + calendar.get(Calendar.WEEK_OF_MONTH));
13. 　　System.out.println("DATE: " + calendar.get(Calendar.DATE));
14. 　　System.out.println("DAY_OF_MONTH: " + calendar.get(Calendar.DAY_OF_MONTH));
15. 　　System.out.println("DAY_OF_YEAR: " + calendar.get(Calendar.DAY_OF_YEAR));
16. 　　System.out.println("DAY_OF_WEEK: " + calendar.get(Calendar.DAY_OF_WEEK));
17. 　　System.out.println("DAY_OF_WEEK_IN_MONTH: " + calendar.get(Calendar.DAY_OF_WEEK_IN_MONTH));
18. 　　System.out.println("AM_PM: " + calendar.get(Calendar.AM_PM));
19. 　　System.out.println("HOUR: " + calendar.get(Calendar.HOUR));
20. 　　System.out.println("HOUR_OF_DAY: " + calendar.get(Calendar.HOUR_OF_DAY));
21. 　　System.out.println("MINUTE: " + calendar.get(Calendar.MINUTE));
22. 　　System.out.println("SECOND: " + calendar.get(Calendar.SECOND));
23. 　　System.out.println("MILLISECOND: " + calendar.get(Calendar.MILLISECOND));
24. 　　System.out.println("ZONE_OFFSET: " + (calendar.get(Calendar.ZONE_OFFSET)/(60*60*1000)));
25. 　　System.out.println("DST_OFFSET: " + (calendar.get(Calendar.DST_OFFSET)/(60*60*1000)));
26. 　　System.out.println("Current Time, with hour reset to 3");
27. 　　calendar.clear(Calendar.HOUR_OF_DAY); // so doesn't override
28. 　　calendar.set(Calendar.HOUR, 3);
29. 　　System.out.println("ERA: " + calendar.get(Calendar.ERA));
30. 　　System.out.println("YEAR: " + calendar.get(Calendar.YEAR));
31. 　　System.out.println("MONTH: " + calendar.get(Calendar.MONTH));
32. 　　System.out.println("WEEK_OF_YEAR: " + calendar.get(Calendar.WEEK_OF_YEAR));
33. 　　System.out.println("WEEK_OF_MONTH: " + calendar.get(Calendar.WEEK_OF_MONTH));
34. 　　System.out.println("DATE: " + calendar.get(Calendar.DATE));
35. 　　System.out.println("DAY_OF_MONTH: " + calendar.get(Calendar.DAY_OF_MONTH));
36. 　　System.out.println("DAY_OF_YEAR: " + calendar.get(Calendar.DAY_OF_YEAR));
37. 　　System.out.println("DAY_OF_WEEK: " + calendar.get(Calendar.DAY_OF_WEEK));
38. 　　System.out.println("DAY_OF_WEEK_IN_MONTH: " + calendar.get(Calendar.DAY_OF_WEEK_IN_MONTH));

posted @ 2012-09-19 09:51 japper 閱讀(6350) | 評論 (0) | 編輯 收藏

Android SDK下載和更新失敗的解決方法

Android SDK下載和更新失敗的解決方法

最近剛換了電腦，開始搭建Android開發環境的時候，下載SDK總是會出現如下錯誤：
 
1.Failed to fetch URL http://dl-ssl.google.com/Android/repository/addons_list-1.xml. 
據說dl-ssl.google.com在大陸被強了，偉大的天朝真是不讓人活了，解決方法就是修改C:\Windows\System32\drivers\etc\hosts文件。添加一行：
 
1.74.125.237.1       dl-ssl.google.com 
這里需要注意的是hosts文件是只讀的，我們沒有權限修改，需要我們將hosts文件復制到桌面或者其他地方，然后修改，代碼如下：
1.# Copyright (c) 1993-2009 Microsoft Corp. 
2.# 
3.# This is a sample HOSTS file used by Microsoft TCP/IP for Windows. 
4.# 
5.# This file contains the mappings of IP addresses to host names. Each 
6.# entry should be kept on an individual line. The IP address should 
7.# be placed in the first column followed by the corresponding host name. 
8.# The IP address and the host name should be separated by at least one 
9.# space. 
10.# 
11.# Additionally, comments (such as these) may be inserted on individual 
12.# lines or following the machine name denoted by a '#' symbol. 
13.# 
14.# For example: 
15.# 
16.#      102.54.94.97     rhino.acme.com          # source server 
17.#       38.25.63.10     x.acme.com              # x client host 
18. 
19.# localhost name resolution is handled within DNS itself. 
20.#   127.0.0.1       localhost 
21.#   ::1             localhost 
22.//親，就是增加這一句哦  
23.74.125.237.1       dl-ssl.google.com 
然后保存，復制修改后的hosts文件到C:\Windows\System32\drivers\etc 目錄，替換文件就好！！！我們再次下載SDK的時候就會成功啦，如下圖：
 

嘿嘿，大功告成啦！！！
 
PS：補充下，在mac或Linux中，hosts文件所在位置為/etc/hosts，可以使用sudo vim /etc/hosts來編輯。

posted @ 2012-09-10 11:18 japper 閱讀(346) | 評論 (0) | 編輯 收藏