Java 中的大数 [英] Large Numbers in Java

问题描述

我将如何在 Java 中进行超大数字的计算?

How would I go about doing calculations with extremely large numbers in Java?

我已经尝试过 long 但它的最大值为 9223372036854775807，当使用整数时，它没有保存足够的数字，因此对于我需要的来说不够准确.

I have tried long but that maxes out at 9223372036854775807, and when using an integer it does not save enough digits and therefore is not accurate enough for what I need.

还有吗?

推荐答案

您可以将 BigInteger 类用于整数，将 BigDecimal 用于带十进制数字的数字.这两个类都在 java.math 包中定义.

You can use the BigInteger class for integers and BigDecimal for numbers with decimal digits. Both classes are defined in java.math package.

示例:

BigInteger reallyBig = new BigInteger("1234567890123456890");
BigInteger notSoBig = new BigInteger("2743561234");
reallyBig = reallyBig.add(notSoBig);

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