Leetcode-709. 转换成小写字母

转换成小写字母"/>

Leetcode-709. 转换成小写字母

709. 转换成小写字母

用空间换时间，设置一个字符数组存放小写字母，遍历一般字符串，判断遇到大写字母的时候进行替换

class Solution {char[] low = {'a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z'};public String toLowerCase(String s) {char [] chars = s.toCharArray();for (int i=0;i<chars.length;i++){if (chars[i] >= 'A' && chars[i] <= 'Z'){chars[i] = low[chars[i]-'A'];}}return String.valueOf(chars);}
}