Solution.java

package String.easy.No_344_Reverse_String;

/**
 * FileName: Solution
 * Author:   EdisonLi的家用MacBook Pro
 * Date:     2019-05-18 19:06
 * Description: Reverse String
 * Write a function that reverses a string. The input string is given as an array of characters char[].
 * <p>
 * Do not allocate extra space for another array, you must do this by modifying the input array in-place with O(1) extra memory.
 * <p>
 * You may assume all the characters consist of printable ascii characters.
 * <p>
 * <p>
 * <p>
 * Example 1:
 * <p>
 * Input: ["h","e","l","l","o"]
 * Output: ["o","l","l","e","h"]
 * Example 2:
 * <p>
 * Input: ["H","a","n","n","a","h"]
 * Output: ["h","a","n","n","a","H"]
 */

public class Solution {
    public void reverseString(char[] s) {
        for (int i = 0; i < s.length / 2; i++) {
            char tem = s[i];
            s[i] = s[s.length - 1 - i];
            s[s.length - 1 - i] = tem ;
        }
    }
}