获取int的位数的方法？ [英] Way to get number of digits in an int?

问题描述

是否有更简洁的方法来获取int的长度？

Is there a neater way for getting the length of an int as this?

int length = String.valueOf(1000).length();

推荐答案

基于String的解决方案完全没问题，有没什么不整洁的。你必须在数学上认识到，数字没有长度，也没有数字。长度和数字都是特定基数中的数字的物理表示的属性，即字符串。

Your String-based solution is perfectly OK, there is nothing "un-neat" about it. You have to realize that mathematically, numbers don't have a length, nor do they have digits. Length and digits are both properties of a physical representation of a number in a specific base, i.e. a String.

基于对数的解决方案（某些）与基于字符串的内部相同的事情，并且可能更快（无关紧要）更快，因为它只产生长度并忽略数字。但我实际上并不认为它的意图更清晰 - 这是最重要的因素。

A logarithm-based solution does (some of) the same things the String-based one does internally, and probably does so (insignificantly) faster because it only produces the length and ignores the digits. But I wouldn't actually consider it clearer in intent - and that's the most important factor.

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