题解 | #反转字符串#

import java.util.*;


public class Solution {
    /**
     * 反转字符串
     * @param str string字符串 
     * @return string字符串
     */
    public String solve (String str) {
        // write code here
        char[] chArr = str.toCharArray();

        for(int i = 0, j = chArr.length-1;i<j;i++,j--){
            char temp = chArr[i];
            chArr[i] = chArr[j];
            chArr[j] = temp;
        }

        return new String(chArr);

    }
}