Java:从 char 中解析 int 值

问题描述

我只是想知道是否有更好的解决方案来从字符串中的字符解析数字(假设我们知道索引 n 处的字符是数字).

I just want to know if there's a better solution to parse a number from a character in a string (assuming that we know that the character at index n is a number).

String element = "el5";
String s;
s = ""+element.charAt(2);
int x = Integer.parseInt(s);

//result: x = 5

(不用说这只是一个例子)

(useless to say that it's just an example)

推荐答案

试试Character.getNumericValue(char).

String element = "el5";
int x = Character.getNumericValue(element.charAt(2));
System.out.println("x=" + x);

产生:

x=5

getNumericValue(char) 的好处是它也适用于 "el٥" 和 "el५" 等字符串，其中 ٥ 和 ५ 分别是东方阿拉伯语和印地语/梵语中的数字 5.

The nice thing about getNumericValue(char) is that it also works with strings like "el٥" and "el५" where ٥ and ५ are the digits 5 in Eastern Arabic and Hindi/Sanskrit respectively.

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