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
        StringBuilder sb = new StringBuilder();
        sb.append(str);
        return sb.reverse().toString();
    }
}