Java - 內部化問題

Question

爲了國際化一個程序，我給了下面的代碼，允許我使用多種語言，具體取決於用戶選擇的內容。

import java.util.*; 
public class I18NSample { 
    static public void main(String[] args) { 
    String language, country; 
    if (args.length != 2) { // default is English-language 
     language = new String("en"); country = new String("US"); 
    } else { 
     language = new String(args[0]); country = new String(args[1]); 
    } 
    Locale currentLocale = new Locale(language, country); 
    ResourceBundle messages = 
     ResourceBundle.getBundle("MessagesBundle", currentLocale); 
    System.out.println(messages.getString("greetings")); 
    System.out.println(messages.getString("inquiry")); 
    System.out.println(messages.getString("farewell")); 
    } 
} 

這是我MessagesBundle文件：

greetings = Hello. 
farewell = Goodbye. 
inquiry = How are you? 

但是在執行我的程序這段代碼的時候，我不能夠使用messages.getString功能在其他班級，我需要在此代碼我的主，因爲它需要String []參數。有沒有辦法解決？

Answer 1

當然，只是移動信息intitialization你的類以上並予以公佈，這樣的：

import java.util.*; 
public class I18NSample { 
    public ResourceBundle messages; 
    static public void main(String[] args) { 
    String language, country; 
    if (args.length != 2) { // default is English-language 
     language = new String("en"); country = new String("US"); 
    } else { 
     language = new String(args[0]); country = new String(args[1]); 
    } 
    Locale currentLocale = new Locale(language, country); 
    messages = 
     ResourceBundle.getBundle("MessagesBundle", currentLocale); 
    System.out.println(messages.getString("greetings")); 
    System.out.println(messages.getString("inquiry")); 
    System.out.println(messages.getString("farewell")); 
    } 
} 

這樣的話，你會採用B能夠從其他類訪問I18NSample.ResourceBundle

Answer 2

所以你在這裏不是一個國際化問題，它是一個代碼結構問題。

您的messages變量是主要方法的局部變量。將它作爲類的字段，然後在main中初始化它。

下面的例子是向你展示我的意思。以類似的方式初始化您的語言環境可能很有意義。

import java.util.*; 

public class I18NSample { 

    private ResourceBundle messages; //this may have to be static to initialize it in main 

    static public void main(String[] args) { 
    String language, country; 
    if (args.length != 2) { // default is English-language 
     language = new String("en"); country = new String("US"); 
    } else { 
     language = new String(args[0]); country = new String(args[1]); 
    } 
    Locale currentLocale = new Locale(language, country); 
    messages = 
     ResourceBundle.getBundle("MessagesBundle", currentLocale); 
    System.out.println(messages.getString("greetings")); 
    System.out.println(messages.getString("inquiry")); 
    System.out.println(messages.getString("farewell")); 
    } 

    //this getter exposes the ResourceBundle so you can use it outside of this class 
    public ResourceBundle getMessages() { return messages; } 
}