【一次過】Lintcode 1173. Reverse Words in a String III
阿新 • • 發佈:2018-12-12
Given a string, you need to reverse the order of characters in each word within a sentence while still preserving whitespace and initial word order.
樣例
Input: "Let's take LeetCode contest"
Output: "s'teL ekat edoCteeL tsetnoc"
注意事項
In the string, each word is separated by single space and there will not be any extra space in the string.
解題思路:
先用空格對字串進行分割,然後對每個字元進行翻轉,注意翻轉方法reverse()只有StringBuilder與StringBuffer才有。而trim()方法只有String才有,不要記混了。
public class Solution { /** * @param s: a string * @return: reverse the order of characters in each word within a sentence while still preserving whitespace and initial word order */ public String reverseWords(String s) { // Write your code here String[] strs = s.split(" "); StringBuilder res = new StringBuilder(); for(String str : strs){ res.append(new StringBuilder(str).reverse()); res.append(" "); } return res.toString().trim(); } }