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README.TXT

      1 Copyright (c) 2002-2010, International Business Machines Corporation and others. All Rights Reserved.
      2 
      3 IMPORTANT:
      4 
      5 This sample was originally intended as an exercise for the ICU Workshop (September 2000).
      6 The code currently provided in the solution file is the answer to the exercises, each step can still be found in the 'answers' subdirectory.
      7 
      8 
      9 
     10 ** Workshop homepage is:  
     11   http://www.icu-project.org/docs/workshop_2000/agenda.html
     12 
     13   #Date/Time/Number Formatting Support
     14   9:30am - 10:30am
     15   Alan Liu
     16 
     17   Topics:
     18   1. What is the date/time support in ICU?
     19   2. What is the timezone support in ICU?
     20   3. What kind of formatting and parsing support is available in ICU, i.e.
     21   NumberFormat, DateFormat, MessageFormat?
     22 
     23 
     24 INSTRUCTIONS
     25 ------------
     26 
     27 This exercise was first developed and tested on ICU release 1.6.0, Win32,
     28 Microsoft Visual C++ 6.0.  It should work on other ICU releases and
     29 other platforms as well.
     30 
     31  MSVC:
     32    Open the file "datefmt.sln" in Microsoft Visual C++.
     33 
     34  Unix:
     35    - Build and install ICU with a prefix, for example '--prefix=/home/srl/ICU'
     36    - Set the variable  ICU_PREFIX=/home/srl/ICU and use GNU make in 
     37         this directory.
     38    - You may use 'make check' to invoke this sample.
     39 
     40 PROBLEMS
     41 --------
     42 
     43 Problem 0:
     44 
     45   Set up the program, build it, and run it.  To start with, the
     46   program prints out a list of languages.
     47 
     48 Problem 1: Basic Date Formatting (Easy)
     49 
     50   Create a calendar, and use it to get the UDate for June 4, 1999,
     51   0:00 GMT (or any date of your choosing).  You will have to create a
     52   TimeZone (use the createZone() function already defined in main.cpp)
     53   and a Calendar object, and make the calendar use the time zone.
     54 
     55   Once you have the UDate, create a DateFormat object in each of the
     56   languages in the LANGUAGE array, and display the date in that
     57   language.  Use the DateFormat::createDateInstance() method to create
     58   the date formatter.
     59 
     60 Problem 2: Date Formatting, Specific Time Zone (Medium)
     61 
     62   To really localize a time display, one can also specify the time
     63   zone in which the time should be displayed.  For each language,
     64   also create different time zones from the TIMEZONE list.
     65 
     66   To format a date with a specific calendar and zone, you must deal with
     67   three objects: a DateFormat, a Calendar, and a TimeZone.  Each object
     68   must be linked to another in correct sequence:  The Calendar must use
     69   the TimeZone, and the DateFormat must use the Calendar.
     70 
     71     DateFormat  =uses=>  Calendar  =uses=>  TimeZone
     72 
     73   Use either setFoo() or adoptFoo() methods, depending on where you
     74   want to have ownership.
     75 
     76   NOTE: It's not always desirable to change the time to a local time
     77   zone before display.  For instance, if some even occurs at 0:00 GMT
     78   on the first of the month, it's probably clearer to just state that.
     79   Stating that it occurs at 5:00 PM PDT on the day before in the
     80   summer, and 4:00 PM PST on the day before in the winter will just
     81   confuse the issue.
     82 
     83 
     84 NOTES
     85 -----
     86 
     87 To see a list of system TimeZone IDs, use the TimeZone::create-
     88 AvailableIDs() methods.  Alternatively, look at the file
     89 icu/docs/tz.htm.  This has a hyperlinked list of current system zones.
     90 
     91 
     92 ANSWERS
     93 -------
     94 
     95 The exercise includes answers.  These are in the "answers" directory,
     96 and are numbered 1, 2, etc.
     97 
     98 If you get stuck and you want to move to the next step, copy the
     99 answers file into the main directory in order to proceed.  E.g.,
    100 "main_1.cpp" contains the original "main.cpp" file.  "main_2.cpp"
    101 contains the "main.cpp" file after problem 1.  Etc.
    102 
    103 
    104 Have fun!
    105