344-Reverse-String.md

344-Reverse String (Java)

Problem

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

Example:

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

Solution 1.

將String 字串轉為 StringBuffer 類別型態，並使用裡面的 reverse() 方法。

• StringBuffer 類別型態
• Run Time: 4 ms
• 時間複雜度: O(1)
• 空間複雜度: O(1)

class Solution {
    public String reverseString(String s) {
        return new StringBuffer(s).reverse().toString();
    }
}