BigInteger.valueOf()用于很大的数字吗? [英] BigInteger.valueOf() for very big numbers?

问题描述

在Java中将50位字符串转换为BigInteger的最佳方法是什么?它没有valueOf(String)方法，而且由于它太小，我无法转换为Long.

What would be the best way to convert a 50-digit String to a BigInteger in Java? It doesn't have a valueOf(String) method, and I can't convert to Long because it's too small.

推荐答案

它确实具有

It does have a BigInteger(String) constructor :-)

String S = "12345678901234567890123456789012345678901234567890";
BigInteger bi = new BigInteger(S);

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