思路:
1.定义双指针,分别指向数组开始和结尾
2.循环,每次交换两个指针指向的字符,即可完成反转。
class Solution {
public void reverseString(char[] s) {
int left = 0;
int right = s.length - 1;
while (left < right){
char temp = s[left];
s[left] = s[right];
s[right] = temp;
left++;
right--;
}
}
}