在Java中存储大十进制数 [英] Storing large decimal numbers in Java

问题描述

我需要以双重格式存储17774132，但是自从我得到1.7774132E7以来，似乎翻了一番.

I need to store 17774132 in a double format, but it seems that double is to small since I get 1.7774132E7.

我该如何克服这个问题?我需要某种可以用浮点数保存的原语.

How can I overcome this problem? I need some kind of primitive that can hold it with floating point.

谢谢

推荐答案

在Java中，如果要对带分数的大数进行准确的计算，则应使用java.math.BigDecimal类.对应的整数是java.math.BigInteger.

In java if you want accurate calculations for large numbers with fractions, you should use java.math.BigDecimal class. The integer counterpart is java.math.BigInteger.

我还认为double可以容纳17774132，它只是在称为"E表示法"的值中显示值，科学表示法表示数字.请参考: http://en.wikipedia.org/wiki/Scientific_notation#E_notation

Also I think double can accomodate 17774132, it's just showing the value in something called as "E Notation" which a Scientific notation to denote numbers. Refer to this : http://en.wikipedia.org/wiki/Scientific_notation#E_notation

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