2012年9月10日随笔档案 - ……天天向上

2012年9月10日 #

calendar获取当前日期及时间的用例

import Java.util.*;
　　public class ShowDate {
　　public static void main(String[] args) {
　　Calendar calendar = new GregorianCalendar();
　　Date trialTime = new Date();
　　calendar.setTime(trialTime);
　　// print out a bunch of interesting things
　　System.out.println("ERA: " + calendar.get(Calendar.ERA));
　　System.out.println("YEAR: " + calendar.get(Calendar.YEAR));
　　System.out.println("MONTH: " + calendar.get(Calendar.MONTH));
　　System.out.println("WEEK_OF_YEAR: " + calendar.get(Calendar.WEEK_OF_YEAR));
　　System.out.println("WEEK_OF_MONTH: " + calendar.get(Calendar.WEEK_OF_MONTH));
　　System.out.println("DATE: " + calendar.get(Calendar.DATE));
　　System.out.println("DAY_OF_MONTH: " + calendar.get(Calendar.DAY_OF_MONTH));
　　System.out.println("DAY_OF_YEAR: " + calendar.get(Calendar.DAY_OF_YEAR));
　　System.out.println("DAY_OF_WEEK: " + calendar.get(Calendar.DAY_OF_WEEK));
　　System.out.println("DAY_OF_WEEK_IN_MONTH: " + calendar.get(Calendar.DAY_OF_WEEK_IN_MONTH));
　　System.out.println("AM_PM: " + calendar.get(Calendar.AM_PM));
　　System.out.println("HOUR: " + calendar.get(Calendar.HOUR));
　　System.out.println("HOUR_OF_DAY: " + calendar.get(Calendar.HOUR_OF_DAY));
　　System.out.println("MINUTE: " + calendar.get(Calendar.MINUTE));
　　System.out.println("SECOND: " + calendar.get(Calendar.SECOND));
　　System.out.println("MILLISECOND: " + calendar.get(Calendar.MILLISECOND));
　　System.out.println("ZONE_OFFSET: " + (calendar.get(Calendar.ZONE_OFFSET)/(60*60*1000)));
　　System.out.println("DST_OFFSET: " + (calendar.get(Calendar.DST_OFFSET)/(60*60*1000)));
　　System.out.println("Current Time, with hour reset to 3");
　　calendar.clear(Calendar.HOUR_OF_DAY); // so doesn't override
　　calendar.set(Calendar.HOUR, 3);
　　System.out.println("ERA: " + calendar.get(Calendar.ERA));
　　System.out.println("YEAR: " + calendar.get(Calendar.YEAR));
　　System.out.println("MONTH: " + calendar.get(Calendar.MONTH));
　　System.out.println("WEEK_OF_YEAR: " + calendar.get(Calendar.WEEK_OF_YEAR));
　　System.out.println("WEEK_OF_MONTH: " + calendar.get(Calendar.WEEK_OF_MONTH));
　　System.out.println("DATE: " + calendar.get(Calendar.DATE));
　　System.out.println("DAY_OF_MONTH: " + calendar.get(Calendar.DAY_OF_MONTH));
　　System.out.println("DAY_OF_YEAR: " + calendar.get(Calendar.DAY_OF_YEAR));
　　System.out.println("DAY_OF_WEEK: " + calendar.get(Calendar.DAY_OF_WEEK));
　　System.out.println("DAY_OF_WEEK_IN_MONTH: " + calendar.get(Calendar.DAY_OF_WEEK_IN_MONTH));

posted @ 2012-09-19 09:51 japper 阅读(6339) | 评论 (0) | 编辑收藏

最近刚换了电脑，开始搭建Android开发环境的时候，下载SDK总是会出现如下错误：

1.Failed to fetch URL http://dl-ssl.google.com/Android/repository/addons_list-1.xml.
据说dl-ssl.google.com在大陆被强了，伟大的天朝真是不让人活了，解决方法就是修改C:\Windows\System32\drivers\etc\hosts文件。添加一行：

1.74.125.237.1       dl-ssl.google.com
这里需要注意的是hosts文件是只读的，我们没有权限修改，需要我们将hosts文件复制到桌面或者其他地方，然后修改，代码如下：
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.//亲，就是增加这一句哦
23.74.125.237.1       dl-ssl.google.com
然后保存，复制修改后的hosts文件到C:\Windows\System32\drivers\etc 目录，替换文件就好！！！我们再次下载SDK的时候就会成功啦，如下图：

嘿嘿，大功告成啦！！！

PS：补充下，在mac或Linux中，hosts文件所在位置为/etc/hosts，可以使用sudo vim /etc/hosts来编辑。

posted @ 2012-09-10 11:18 japper 阅读(339) | 评论 (0) | 编辑收藏

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calendar获取当前日期及时间的用例

Android SDK下载和更新失败的解决方法