LeetCode之Reverse String

1、题目：

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

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

2、代码实现：

代码实现1:

    public static String reverseString(String s) {if (s == null) {return null;}if (s.length() == 0) {return "";}int length = s.length();char[] chars = s.toCharArray();String result = "";for (int i = chars.length - 1; i >=0; --i) {result += chars[i];}return result;}

代码实现2:

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

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LeetCode之Reverse String

1、题目：

2、代码实现：

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