Java Locale.Builder setLanguageTag()用法及代码示例

Java中的java.util.Locale.Builder类的setLanguageTag(String)方法用于将此Locale.Builder重置为指定的IETF BCP 47语言标记。这意味着此方法将重置Locale.Builder实例的当前状态以匹配提供的语言标记并返回它。

用法:

public Locale.Builder setLanguageTag(String languageTag)

参数：此方法接受languageTag作为参数，这是要设置为此Locale.Builder实例的String。

返回值：此方法返回一个Locale.Builder实例，该实例是将此Locale.Builder设置为指定语言标记的状态。

异常：此方法引发以下异常：

IllformedLocaleException：如果指定的languageTag具有任何格式错误的字段

程序1:

// 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 languageTag 
        // of Locale.Builder 
        String languageTag = "FRENCH"; 
        System.out.println("Setting the language:"
                           + languageTag); 
  
        localeBuilder 
            = localeBuilder 
                  .setLanguageTag(languageTag); 
  
        // Displaying Locale.Builder 
        System.out.println("Updated LocaleBuilder:"
                           + localeBuilder); 
    } 
}

输出：

LocaleBuilder:java.util.Locale$Builder@232204a1
Setting the language:FRENCH
Updated LocaleBuilder:java.util.Locale$Builder@232204a1

程序2:

// 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 languageTag 
        // of Locale.Builder 
        String languageTag = "asdasf@!vsd#"; 
        System.out.println("Setting the languageTag:"
                           + languageTag); 
  
        try { 
            localeBuilder 
                = localeBuilder 
                      .setLanguageTag(languageTag); 
  
            // 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 languageTag:asdasf@!vsd#
java.util.IllformedLocaleException:Invalid subtag:asdasf@!vsd# [at index 0]

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

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注：本文由纯净天空筛选整理自Code_r大神的英文原创作品 Locale.Builder setLanguageTag() method in Java with Examples。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。