LeetCode Reverse String

Posted 2020-08-04 Dylan_Java_NYC

原题链接在这里：https://leetcode.com/problems/reverse-string/

题目：

Write a function that takes a string as input and returns the string reversed.

Example:
Given s = "hello", return "olleh".

题解：

Reverse string是常见题, string在Java中是primitive类型, 一旦生成不可改变.

AC Java:

 1 public class Solution {
 2     public String reverseString(String s) {
 3         if(s == null || s.length() == 0){
 4             return s;
 5         }
 6         
 7         StringBuilder sb = new StringBuilder(s);
 8         return sb.reverse().toString();
 9     }
10 }