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

Java中Java .util.Locale.Builder 类的setLocale(Locale)方法用于将此Locale.Builder 重置为指定的Locale。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 Locale 并返回它。

句法：

public Locale.Builder setLocale(Locale locale)

参数：此方法接受语言环境作为参数，该参数是要设置为此 Locale.Builder 实例的语言环境。

返回值：此方法返回一个Locale.Builder 实例，该实例是此 Locale.Builder 设置为指定 Locale 的状态。

异常：此方法抛出以下异常：

• IllformedLocaleException：如果指定的语言环境有任何格式错误的字段
• NullPointerException：如果指定的语言环境为 null

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 locale of Locale.Builder
        Locale locale = Locale.FRANCE;
        System.out.println("Setting the Locale: "
                           + locale);
  
        localeBuilder
            = localeBuilder.setLocale(locale);
  
        // Displaying Locale.Builder
        System.out.println("Updated LocaleBuilder: "
                           + localeBuilder);
    }
}

输出：

LocaleBuilder: java.util.Locale$Builder@232204a1
Setting the Locale: fr_FR
Updated LocaleBuilder: java.util.Locale$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 locale of Locale.Builder
        Locale locale = Locale.ENGLISH;
        System.out.println("Setting the Locale: "
                           + locale);
  
        localeBuilder
            = localeBuilder.setLocale(locale);
  
        // Displaying Locale.Builder
        System.out.println("Updated LocaleBuilder: "
                           + localeBuilder);
    }
}

输出：

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

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