本文介绍了NumberFormat.parse()不适用于法国语言环境空间，因为千位分隔符的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我在Java代码下面编写了代码，以查看语言环境如何与数字一起表现.我正面临着法国风格.
I have written below Java code to see how locales behave with numbers. I am facing with FRENCH style.
double n = 123456789.123;
System.out.println("US "+ NumberFormat.getNumberInstance(Locale.US).format(n)); //###,###.###
System.out.println("FRENCH "+ NumberFormat.getNumberInstance(Locale.FRENCH).format(n)); // # ###,##
System.out.println("GERMAN "+ NumberFormat.getNumberInstance(Locale.GERMAN).format(n)); // ###.###,##
System.out.println(NumberFormat.getNumberInstance(Locale.US).parse("123,451.23"));
System.out.println(NumberFormat.getNumberInstance(Locale.GERMANY).parse("123.451,23"));
System.out.println(NumberFormat.getNumberInstance(Locale.FRANCE).parse("123 451,23"));
输出
US 123,456,789.123
FRENCH 123 456 789,123
GERMAN 123.456.789,123
123451.23
123451.23
123
如您所见，空格被用作FRENCH语言环境的千位分隔符.但是，当我尝试生成数字"123 451,23"时，它无法将空格识别为千位分隔符.
As you can see space is used as thousands separator for FRENCH locale. But when I tried to generate number "123 451,23" it does not recognize space as thousands separator.
这是预期的行为吗?
解决方法是将空格替换为.".这样数字就变成了德国格式.然后使用该语言环境进行转换.
As a workaround I replaced space with ".". So number becomes a GERMANY format. And then convert it using that locale.
input = input.replace(" ", ".");
// Now "123 451,23" is "123.451,23" So which is same as german
System.out.println(NumberFormat.getNumberInstance(Locale.GERMANY).parse(input));
输出
123451.23
推荐答案
这是旧JDK中的一个已知问题.升级它，否则您将问题
This is a known issue in old JDKs. Upgrade it or you will this issue
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