Java的Locale getISO3Country() 方法和示例

Java中Locale 类的getISO3Country()方法用于获取指定语言环境的国家或地区代码。如果语言环境未指定国家/地区，则这将是大写的 ISO 3166 3 字母国家/地区代码或空字符串。

句法：

LOCALE.getISO3Country()

参数：该方法不带任何参数。

返回值：此方法不返回任何值。

例外：如果三个字母的国家/地区缩写不适用于指定的语言环境，则该方法将引发MissingResourceException 。

下面的程序说明了 getISO3Country() 方法的工作：

方案一：

// Java code to illustrate getISO3Country() method
  
import java.util.*;
  
public class Locale_Demo {
    public static void main(String[] args)
    {
  
        // Creating a new locale
        Locale first_locale
            = new Locale("en", "IN");
  
        // Displaying first locale
        System.out.println("First Locale: "
                           + first_locale);
  
        // Displaying the country_code of this locale
        System.out.println("Country: "
                           + first_locale.getISO3Country());
    }
}

输出：

First Locale: en_IN
Country: IND

方案二：

// Java code to illustrate getISO3Country() method
import java.util.*;
  
public class Locale_Demo {
    public static void main(String[] args)
    {
  
        // Creating a new locale
        Locale first_locale
            = new Locale("ar", "SA");
  
        // Displaying first locale
        System.out.println("First Locale: "
                           + first_locale);
  
        // Displaying the country_code of this locale
        System.out.println("Country: "
                           + first_locale.getISO3Country());
    }
}

输出：

First Locale: ar_SA
Country: SAU

程序 3：显示错误

// Java code to illustrate getISO3Country() method
import java.util.*;
  
public class Locale_Demo {
    public static void main(String[] args)
    {
  
        // Creating a new locale
        Locale first_locale
            = new Locale("ar", "tez");
  
        // Displaying first locale
        System.out.println("First Locale: "
                           + first_locale);
  
        try {
            // Displaying the country_code of this locale
            System.out.println("Country: "
                               + first_locale.getISO3Country());
        }
        catch (Exception e) {
            System.out.println(e);
        }
    }
}

输出：

First Locale: ar_TEZ
java.util.MissingResourceException: Couldn't find 3-letter country code for TEZ