jars/icu4j-4_4_2-src/demos/src/com/ibm/icu/dev/demo/number/CurrencyDemo.java

   1 /*\r
   2 **********************************************************************\r
   3 * Copyright (c) 2003-2010, International Business Machines\r
   4 * Corporation and others.  All Rights Reserved.\r
   5 **********************************************************************\r
   6 * Author: Mark Davis\r
   7 * Created: May 22 2003\r
   8 * Since: ICU 2.6\r
   9 **********************************************************************\r
  10 */\r
  11 package com.ibm.icu.dev.demo.number;\r
  12 import java.util.HashMap;\r
  13 import java.util.Locale;\r
  14 import java.util.Map;\r
  15 \r
  16 import com.ibm.icu.impl.Utility;\r
  17 import com.ibm.icu.text.DecimalFormat;\r
  18 import com.ibm.icu.text.DecimalFormatSymbols;\r
  19 import com.ibm.icu.text.NumberFormat;\r
  20 import com.ibm.icu.util.Currency;\r
  21 \r
  22 /**\r
  23  * Demonstration code to illustrate how to obtain ICU 2.6-like currency\r
  24  * behavior using pre-ICU 2.6 ICU4J.\r
  25  * @author Mark Davis\r
  26  */\r
  27 public class CurrencyDemo {\r
  28 \r
  29     public static void main(String[] args) {\r
  30         testFormatHack(true);\r
  31     }\r
  32 \r
  33     static NumberFormat getCurrencyFormat(Currency currency,\r
  34                                           Locale displayLocale,\r
  35                                           boolean ICU26) {\r
  36         // code for ICU 2.6\r
  37         if (ICU26) {\r
  38             NumberFormat result = NumberFormat.getCurrencyInstance(displayLocale);\r
  39             result.setCurrency(currency);\r
  40             return result;\r
  41         }\r
  42 \r
  43         // ugly work-around for 2.4\r
  44         DecimalFormat result = (DecimalFormat)NumberFormat.getCurrencyInstance(displayLocale);\r
  45         HackCurrencyInfo hack = (HackCurrencyInfo)(hackData.get(currency.getCurrencyCode()));\r
  46         result.setMinimumFractionDigits(hack.decimals);\r
  47         result.setMaximumFractionDigits(hack.decimals);\r
  48         result.setRoundingIncrement(hack.rounding);\r
  49         DecimalFormatSymbols symbols = result.getDecimalFormatSymbols();\r
  50         symbols.setCurrencySymbol(hack.symbol);\r
  51         result.setDecimalFormatSymbols(symbols);\r
  52         return result;\r
  53     }\r
  54         \r
  55     static Map hackData = new HashMap();\r
  56     static class HackCurrencyInfo {\r
  57         int decimals;\r
  58         double rounding;\r
  59         String symbol;\r
  60         HackCurrencyInfo(int decimals, double rounding, String symbol) {\r
  61             this.decimals = decimals;\r
  62             this.rounding = rounding;\r
  63             this.symbol = symbol;\r
  64         }\r
  65     }\r
  66     static {\r
  67         hackData.put("USD", new HackCurrencyInfo(2, 0, "$"));\r
  68         hackData.put("GBP", new HackCurrencyInfo(2, 0, "\u00A3"));\r
  69         hackData.put("JPY", new HackCurrencyInfo(0, 0, "\u00A5"));\r
  70         hackData.put("EUR", new HackCurrencyInfo(2, 0, "\u20AC"));\r
  71     }\r
  72 \r
  73     /**\r
  74      * Walk through all locales and compare the output of the ICU26\r
  75      * currency format with the "hacked" currency format.\r
  76      * @param quiet if true, only display discrepancies.  Otherwise,\r
  77      * display all results.\r
  78      */\r
  79     static void testFormatHack(boolean quiet) {\r
  80         String[] testCurrencies = {"USD","GBP","JPY","EUR"};\r
  81         Locale[] testLocales = NumberFormat.getAvailableLocales();\r
  82         for (int i = 0; i < testLocales.length; ++i) {\r
  83             // since none of this should vary by country, we'll just do by language\r
  84             if (!testLocales[i].getCountry().equals("")) continue;\r
  85             boolean noOutput = true;\r
  86             if (!quiet) {\r
  87                 System.out.println(testLocales[i].getDisplayName());\r
  88                 noOutput = false;\r
  89             }\r
  90             for (int j = 0; j < testCurrencies.length; ++j) {\r
  91                 NumberFormat nf26 = getCurrencyFormat(Currency.getInstance(testCurrencies[j]), testLocales[i], true);\r
  92                 String str26 = nf26.format(1234.567);\r
  93                 if (!quiet) {\r
  94                     System.out.print("\t" + Utility.escape(str26));\r
  95                 }\r
  96                 NumberFormat nf24 = getCurrencyFormat(Currency.getInstance(testCurrencies[j]), testLocales[i], false);\r
  97                 String str24 = nf24.format(1234.567);\r
  98                 if (!str24.equals(str26)) {\r
  99                     if (noOutput) {\r
 100                         System.out.println(testLocales[i].getDisplayName());\r
 101                         noOutput = false;\r
 102                     }\r
 103                     if (quiet) {\r
 104                         System.out.print("\t" + Utility.escape(str26));\r
 105                     }\r
 106                     System.out.print(" (" + Utility.escape(str24) + ")");\r
 107                 }\r
 108             }\r
 109             if (!noOutput) {\r
 110                 System.out.println();\r
 111             }\r
 112         }\r
 113     }\r
 114 }\r