Java Locale.Builder setVariant()用法及代碼示例

Java中的java.util.Locale.Builder類的setVariant(String)方法用於將此Locale.Builder設置為指定的變體。這意味著此方法將設置Locale.Builder實例的當前變體以匹配提供的變體並返回它。如果指定的變量為null或為空，則將刪除此LocaleBuilder的變量。根據IETF BCP 47變體子標簽的語法要求檢查了指定的變體，然後將其標準化為小寫。

用法:

public Locale.Builder setVariant(String variant)

參數：此方法接受變量作為參數，該參數是要設置為此Locale.Builder實例的String。

返回值：此方法返回一個Locale.Builder實例，並將此Locale.Builder的變量集設置為指定的變量。

異常：此方法引發以下異常：

IllformedLocaleException：如果指定的變量具有任何格式錯誤的字段

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); 
    } 
}

輸出：

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); 
            } 
    } 
}

輸出：

LocaleBuilder:java.util.Locale$Builder@232204a1
Setting the variant:asdasf@!vsd#
java.util.IllformedLocaleException:
 Ill-formed variant:
 asdasf@!vsd# [at index 0]

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

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注：本文由純淨天空篩選整理自Code_r大神的英文原創作品 Locale.Builder setVariant() method in Java with Examples。非經特殊聲明，原始代碼版權歸原作者所有，本譯文未經允許或授權，請勿轉載或複製。