Poechant 解讀 Java API —— 藉助貨幣格式化，初識 Locale 和 NumberFormat

Locale 屬於 java.util.Locale 包

NumberFormat 屬於 java.text.NumberFormat 包

NumberFormat java.text.NumberFormat.getCurrencyInstance();NumberFormat java.text.NumberFormat.getCurrencyInstance(java.util.Locale);String java.util.NumberFormat.format(long);String java.util.NumberFormat.format(int);String java.util.NumberFormat.format(double);String java.util.NumberFormat.format(float);

入門的使用是比較簡單的，以下面代碼為例

import java.text.NumberFormat;import java.util.Locale;public class Test {public static void main(String[] args) {LocaleTest.print();}}class LocaleTest {static public void print() {String countries[] = {"China","Canada","Korea","Taiwan","France","Italy","Japan","Germany","US","UK"};Locale locale[] = {Locale.CHINA,Locale.CANADA,Locale.KOREA,Locale.TAIWAN,Locale.FRANCE,Locale.ITALY,Locale.JAPAN,Locale.GERMANY,Locale.US,Locale.UK};int len = countries.length;for (int i = 0; i < len; ++i) {System.out.println(countries[i] + ": " + NumberFormat.getCurrencyInstance(locale[i]).format(120000));}}}