执行区域设置比较的正确方法

Question

目前，我想知道哪些属性文件正在我的应用程序中加载。

/* 
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*/ 

package example0; 

import java.util.Locale; 

/** 
* 
* @author yccheok 
*/ 
public class Main { 

    /** 
    * @param args the command line arguments 
    */ 
    public static void main(String[] args) { 
     //Locale.setDefault(Locale.SIMPLIFIED_CHINESE);  // Bundle_zh_CH.properties will be loaded. 
     //Locale.setDefault(Locale.CHINA);     // Bundle_zh_CH.properties will be loaded. 
     //Locale.setDefault(Locale.TRADITIONAL_CHINESE); // Bundle.properties will be loaded. 
     //Locale.setDefault(Locale.CHINESE);    // Bundle.properties will be loaded. 

     String Hello = java.util.ResourceBundle.getBundle("example0/Bundle").getString("HELLO"); 
     System.out.println(Hello); 

     System.out.println("Locale.SIMPLIFIED_CHINESE's language : " + Locale.SIMPLIFIED_CHINESE.getLanguage()); 
     System.out.println("Locale.CHINA's language : " + Locale.CHINA.getLanguage()); 
     System.out.println("Locale.TRADITIONAL_CHINESE's language : " + Locale.TRADITIONAL_CHINESE.getLanguage()); 
     System.out.println("Locale.CHINESE's language : " + Locale.CHINESE.getLanguage()); 

     System.out.println("Locale.SIMPLIFIED_CHINESE's country : " + Locale.SIMPLIFIED_CHINESE.getCountry()); 
     System.out.println("Locale.CHINA's country : " + Locale.CHINA.getCountry()); 
     System.out.println("Locale.TRADITIONAL_CHINESE's country : " + Locale.TRADITIONAL_CHINESE.getCountry()); 
     System.out.println("Locale.CHINESE's country : " + Locale.CHINESE.getCountry()); 
    } 

} 

以下是输出：

Hello 
Locale.SIMPLIFIED_CHINESE's language : zh 
Locale.CHINA's language : zh 
Locale.TRADITIONAL_CHINESE's language : zh 
Locale.CHINESE's language : zh 
Locale.SIMPLIFIED_CHINESE's country : CN 
Locale.CHINA's country : CN 
Locale.TRADITIONAL_CHINESE's country : TW 
Locale.CHINESE's country : 

以前，以确定是否属性文件Bundle_zh_CH.properties将被加载，我执行以下比较。

if (Locale.getDefault() == Locale.SIMPLIFIED_CHINESE) 

但是，除SIMPLIFIED_CHINESE以外的某些语言环境也会加载Bundle_zh_CH.properties。

什么是我这样做的可靠方法？

难道我

if (Locale.getDefault() == Locale.SIMPLIFIED_CHINESE || Locale.getDefault() == Locale.China) 

或

if (Locale.getDefault().equals("CN")) 

Answer 1

不要依赖于等于运营商比较，因为你可以创建具有其公共构造新的语言环境实例。在下面的代码：

Locale simpChinese = new Locale("zh","CN",""); 
System.out.println(simpChinese == Locale.SIMPLIFIED_CHINESE); 
System.out.println(simpChinese.equals(Locale.SIMPLIFIED_CHINESE)); 

打印：

false 
true