BigDecimal和BigInteger的限制是什么? [英] What are the limits of BigDecimal and BigInteger?

问题描述

我在程序中将两个非常大的BigInteger值相乘.失败了BigInteger和BigDecimal的限制是什么?

I was multiplying very two huge BigIntegervalues in a program. It failed. What are the limits of BigInteger and BigDecimal ?

推荐答案

您不会获得NumberFormatException与大数字相乘的结果.如果生成的数字太大，则在数组大小溢出时，您将得到一个神秘的NegativeArraySizeException.

You won't get NumberFormatException multiplying large numbers. If the number produced is too large, you will get a cryptic NegativeArraySizeException as the size of the array overflows.

您更有可能遇到内存不足错误.

You are more likely to get an out of memory error.

BigInteger的限制为32 * 2 ^ 32-1位，或大约2 ^(40亿).

The limit is 32 * 2^32-1 bits for BigInteger or about 2^(4 billion).

如果您可以获取NumberFormatException

You can get a NumberFormatException if you

• 从一个空字节创建一个BigInteger []
• 使用符号< -1或> +1
• 尝试解析以> 36或<为底的数字2
• 有一个包含非法数字的字符串.

当您遇到异常时，您还应该查看消息和堆栈跟踪，因为这通常可以为您提供真正的原因.

When you get an exception you should also look at the message and the stack trace as this usually gives you the real cause.

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