相当于Java不变文化 [英] Java equivalent of Invariant Culture

问题描述

我转换下面的C＃代码到Java。 ？是否有一个Java等同于固定区域性的.NET概念

 串上= myString.ToUpperInvariant（）; 
  

由于固定区域性其实只是美国的文化，我可以做这样的事情在Java中，但我不知道是否有更好的方式：

 字符串上= myString.toUpperCase（Locale.US）; 
  

解决方案

没有，那是基本上正确的道路要走。虽然是的美国文化和格式方面的不变的文化差异，我不相信它们会影响大小写规则。

编辑：其实，一个快速的测试程序显示有是的字符，这是在美国文化中的.NET不变区域性大写的区别为：

 使用系统; 
使用System.Globalization; 
 
类测试
 {
静态无效的主要（）
 {
的CultureInfo我们=新的CultureInfo（EN-US）; 
的for（int i = 0; I< 65536;我++）
 {
字符C =（char）的我; 
字符串s = c.ToString（）; 
如果（s.ToUpperInvariant（）= s.ToUpper（我们）！）
 {
 Console.WriteLine（i.ToString（×4））; 
} 
} 
} 
} 
  

输出

  00b5 
 0131 
拉丁文扩展-A 
 01c5 
 01c8 
 01cb 
 01f2 
 0345 
 0390 
 03b0 
 03C2 
 03d0 
 03d1 
 03d5 
 03d6 
 03f0 
 03f1 
 03f5 
 1e9b 
 1fbe 
  

我没有时间在这些权利现在看起来，但它是值得探讨。我不知道，如果同样的差异会在Java中使用 - 你可能想利用这些样本，并制定出你希望你的代码做什么

编辑：而只是为了完美主义，这是值得一提的是单个字符......只有支票，而你真的上层套管整个字符串，它可以有所作为

综观的的Java 的对上层套管，这似乎只对TR，AZ和LT国家的具体语言环境的行为的代码。我知道，TR是土耳其，但我不知道其他人...

I am converting the following C# code to Java. Is there a Java equivalent to the .NET concept of Invariant Culture?

string upper = myString.ToUpperInvariant();

Since the Invariant Culture is really just the US culture, I could just do something like this in Java, but I'm wondering if there is a better way:

String upper = myString.toUpperCase(Locale.US);

解决方案

No, that's basically the right way to go. While there are differences between the US culture and the invariant culture in terms of formatting, I don't believe they affect casing rules.

EDIT: Actually, a quick test program shows there are characters which are upper-cased differently in .NET in the US culture to in the invariant culture:

using System;
using System.Globalization;

class Test
{
    static void Main()
    {
        CultureInfo us = new CultureInfo("en-US");
        for (int i = 0; i < 65536; i++)
        {
            char c = (char) i;
            string s = c.ToString();
            if (s.ToUpperInvariant() != s.ToUpper(us))
            {
                Console.WriteLine(i.ToString("x4"));
            }
        }
    }    
}

Output:

00b5
0131
017f
01c5
01c8
01cb
01f2
0345
0390
03b0
03c2
03d0
03d1
03d5
03d6
03f0
03f1
03f5
1e9b
1fbe

I don't have time to look at these right now, but it's worth investigating. I don't know if the same differences would apply in Java - you probably want to take a sample of them and work out what you want your code to do.

EDIT: And just to be completist, it's worth mentioning that that only checks for individual characters... whereas you're really upper-casing whole strings, which can make a difference.

Looking at the Java code for upper-casing, that appears to only have locale-specific behaviour for tr, az and lt countries. I know that tr is Turkey, but I don't know about the others...

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