LeetCode#344-反转字符串
package shuangzhizhen; /* 344. 反转字符串 编写一个函数,其作用是将输入的字符串反转过来。输入字符串以字符数组 char[] 的形式给出。 不要给另外的数组分配额外的空间,你必须原地修改输入数组、使用 O(1) 的额外空间解决这一问题。 你可以假设数组中的所有字符都是 ASCII 码表中的可打印字符。 示例 1: 输入:["h","e","l","l","o"] 输出:["o","l","l","e","h"] 示例 2: 输入:["H","a","n","n","a","h"] 输出:["h","a","n","n","a","H"] */ public class p344 { public void reverseString(char[] s) { if(s.length<=1)return; int left=0,right=s.length-1; while (left<right){ char tmp=s[left]; s[left]=s[right]; s[right]=tmp; left++; right--; } } }
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