Java中的 Locale.Builder setUnicodeLocaleKeyword() 方法及示例

Java中Java .util.Locale.Builder类的setUnicodeLocaleKeyword()方法用来设置这个Locale.Builder为指定的unicodeLocaleKeyword键。这意味着此方法将设置 Locale.Builder 实例的当前 unicodeLocaleKeyword 以匹配提供的 unicodeLocaleKeyword 键并键入并返回它。如果指定的 unicodeLocaleKeyword 为 null 或为空，则删除此 LocaleBuilder 的 unicodeLocaleKeyword。

句法：

public Locale.Builder
  setUnicodeLocaleKeyword(
    String unicodeLocaleKeywordKey, 
    String unicodeLocaleKeywordType)

参数：此方法接受两个参数：

• unicodeLocaleKey ：这是要设置为此 Locale.Builder 实例的 unicode Locale 的键字符串
• unicodeLocaleKeywordType ：这是要设置为此 Locale.Builder 实例的 unicode Locale 类型 String

返回类型：此方法返回一个Locale.Builder 实例，并将此 Locale.Builder 的 unicodeLocaleKeyword 设置为指定的 unicodeLocaleKeyword。

异常：此方法抛出以下异常：

• IllformedLocaleException : 如果指定的 unicodeLocaleKeyword 有任何格式错误的字段

方案一：

// Java program to demonstrate
// the above method
  
import java.util.*;
import java.util.Locale.*;
  
public class LocaleBuilderDemo {
    public static void main(String[] args)
    {
  
        // Creating a new Locale.Builder
        Locale.Builder localeBuilder
            = new Builder();
  
        // Displaying Locale.Builder
        System.out.println("LocaleBuilder: "
                           + localeBuilder);
  
        // setting the unicodeLocaleKeyword
        // of Locale.Builder
        String unicodeLocaleKeywordKey = "nu";
        String unicodeLocaleKeywordType = "thai";
  
        System.out.println("Setting the "
                           + "unicodeLocaleKeyword: "
                           + unicodeLocaleKeywordKey + "-"
                           + unicodeLocaleKeywordType);
  
        localeBuilder
            = localeBuilder
                  .setUnicodeLocaleKeyword(
                      unicodeLocaleKeywordKey,
                      unicodeLocaleKeywordType);
  
        // Displaying Locale.Builder
        System.out.println("Updated LocaleBuilder: "
                           + localeBuilder);
    }
}

输出：

LocaleBuilder: java.util.Locale$Builder@232204a1
Setting the unicodeLocaleKeyword: nu-thai
Updated LocaleBuilder: java.util.Locale$Builder@232204a1

方案二：

// Java program to demonstrate
// the above method
  
import java.util.*;
import java.util.Locale.*;
  
public class LocaleBuilderDemo {
    public static void main(String[] args)
    {
  
        // Creating a new Locale.Builder
        Locale.Builder localeBuilder
            = new Builder();
  
        // Displaying Locale.Builder
        System.out.println("LocaleBuilder: "
                           + localeBuilder);
  
        // setting the unicodeLocaleKeyword
        // of Locale.Builder
        String unicodeLocaleKeywordKey = "asf@";
        String unicodeLocaleKeywordType = "afaf$";
  
        System.out.println("Setting the "
                           + "unicodeLocaleKeyword: "
                           + unicodeLocaleKeywordKey + "-"
                           + unicodeLocaleKeywordType);
  
        try {
  
            localeBuilder
                = localeBuilder
                      .setUnicodeLocaleKeyword(
                          unicodeLocaleKeywordKey,
                          unicodeLocaleKeywordType);
  
            // Displaying Locale.Builder
            System.out.println("Updated LocaleBuilder: "
                               + localeBuilder);
        }
        catch (Exception e) {
            System.out.println(e);
        }
    }
}

输出：

LocaleBuilder: java.util.Locale$Builder@232204a1
Setting the unicodeLocaleKeyword: asf@-afaf$
java.util.IllformedLocaleException:
 Ill-formed Unicode locale keyword key:
 asf@ [at index 0]

参考： https://docs.oracle.com/javase/9/docs/api/ Java/util/Locale.Builder.html#setUnicodeLocaleKeyword-java.lang.String-java.lang.String-