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

Java中的java.util.Locale.Builder类的setVariant(String)方法用于将此Locale.Builder设置为指定的变体。这意味着此方法将设置Locale.Builder实例的当前变体以匹配提供的变体并返回它。如果指定的变量为null或为空，则将删除此LocaleBuilder的变量。根据IETF BCP 47变体子标签的语法要求检查了指定的变体，然后将其标准化为小写。

用法:

public Locale.Builder setVariant(String variant)

参数：此方法接受变量作为参数，该参数是要设置为此Locale.Builder实例的String。

返回值：此方法返回一个Locale.Builder实例，并将此Locale.Builder的变量集设置为指定的变量。

异常：此方法引发以下异常：

IllformedLocaleException：如果指定的变量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 variant of Locale.Builder 
        String variant 
            = (new Locale("nu", "NO", "NY")) 
                  .getDisplayVariant(); 
        System.out.println("Setting the variant:"
                           + variant); 
  
        localeBuilder 
            = localeBuilder.setVariant(variant); 
  
        // Displaying Locale.Builder 
        System.out.println("Updated LocaleBuilder:"
                           + localeBuilder); 
    } 
}

输出：

LocaleBuilder:java.util.Locale$Builder@232204a1
Setting the variant:Nynorsk
Updated LocaleBuilder:java.util.Locale$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 variant of Locale.Builder 
        String variant = "asdasf@!vsd#"; 
        System.out.println("Setting the variant:"
                           + variant); 
          
        try{ 
        localeBuilder 
            = localeBuilder.setVariant(variant); 
  
        // 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 variant:asdasf@!vsd#
java.util.IllformedLocaleException:
 Ill-formed variant:
 asdasf@!vsd# [at index 0]

参考： https://docs.oracle.com/javase/9/docs/api/java/util/Locale.Builder.html#setVariant-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 setVariant() 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。