如何在Java中将非常大的String转换为数字

Question

嗨,我有一个像这样的大字符串:

"999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999"

我希望将此字符串转换为long.但我失败了.我做了:

Long.parseLong(longString);

但我收到一个错误:

java.lang.NumberFormatException: For input string: "99999999.......

有什么方法可以避免这种情况吗？

Answer 1

像这样使用BigInteger类:

 BigInteger number = new BigInteger(longString);