仅在需要时显示双精度的小数 [英] Show decimal of a double only when needed

问题描述

我用double（小数）得到了这个问题。

当double = 1.234567然后我使用 String.format（％。3f，myString）;

所以结果是1.234

I got this problem with double (decimals).
When a double = 1.234567 Then I use String.format("%.3f", myString);
So the result is 1.234

但当我的双倍是10

结果将是10,000 < br>
我希望这是10

But when my double is 10
The result will be 10,000
I want this to be 10

他们是否可以说他只需要在有用时显示小数？

Is their a way to say that he only needs to show the decimals when it is "usefull"?

我看到一些关于这个的帖子，但那是php或c＃，找不到关于android / java的东西（也许我看起来不太好）。

I saw some posts about this, but that was php or c#, couldn't find something for android/java about this (maybe I don't look good).

希望你们可以帮我解决这个问题。

Hope you guys can help me out with this.

编辑，现在我用的是这样的： myString.replace（，000，）;

但我认为它们是一个更友好的代码。

Edit, for now I use something like this: myString.replace(",000", "");
But I think their is a more "friendly" code for this.

推荐答案

DecimalFormat 是要走的路：

public static void main(String[] args) {

        double d1 = 1.234567;
        double d2 = 2;
        NumberFormat nf = new DecimalFormat("##.###");
        System.out.println(nf.format(d1));
        System.out.println(nf.format(d2));
    }

将导致

1.235
2

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