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Reverse Words in a String 翻转一个字符串里的单词顺序 @LeetCode

时间:2014-08-13 08:01:55      阅读:182      评论:0      收藏:0      [点我收藏+]

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LeetCode新题,但是比较简单,直接用栈即可

Given an input string, reverse the string word by word.

For example,
Given s = "the sky is blue",
return "blue is sky the".

click to show clarification.

Clarification:

  • What constitutes a word?
    A sequence of non-space characters constitutes a word.
  • Could the input string contain leading or trailing spaces?
    Yes. However, your reversed string should not contain leading or trailing spaces.
  • How about multiple spaces between two words?
    Reduce them to a single space in the reversed string.

public class Solution {
    public String reverseWords(String s) {
        if(s.length() == 0) {
            return s;
        }
        Stack<String> stack = new Stack<String>();
        String[] ss = s.split("\\s+");
        for(String word : ss) {
            stack.push(word);
        }
        StringBuilder sb = new StringBuilder();
        while(!stack.isEmpty()) {
            sb.append(stack.pop()).append(" ");
        }
        return sb.toString().trim();
    }
}











Reverse Words in a String 翻转一个字符串里的单词顺序 @LeetCode,布布扣,bubuko.com

Reverse Words in a String 翻转一个字符串里的单词顺序 @LeetCode

标签:style   http   color   java   os   io   for   ar   

原文地址:http://blog.csdn.net/fightforyourdream/article/details/38531289

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