java 场所。Java 中的 Builder setLanguageTag()方法，示例

场所。Java 中的 Builder setLanguageTag()方法，示例

原文:https://www . geesforgeks . org/locale-builder-setlanguagetag-method-in-Java-with-examples/

java.util 的 setLanguageTag(String) 方法。场所。Java 中的 Builder 类 用来重置这个 Locale。生成器添加到指定的 IETF BCP 47 语言标签中。这意味着此方法将重置 Locale 的当前状态。生成器实例来匹配所提供的语言标记并返回它。

语法:

public Locale.Builder setLanguageTag(String languageTag)

参数:该方法接受语言标签作为参数，该参数是要设置到该地区的字符串。生成器实例。

返回值:该方法返回一个地区。构建器实例，这是该场所的状态。生成器设置为指定的语言标记。

异常:此方法抛出以下异常:

ill formed locale exception : if the specified languageTag has any fields with wrong format.

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 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]