LeetCode-Reverse Words in a String
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<span style="font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif; background-color: rgb(255, 255, 255);">Given an input string, reverse the string word by word.</span>
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.
Java做这道题比较简单,除去空格,分割,倒序插入即可:
public static String reverseWords(String s) {String[] strs = s.split(" ");StringBuilder sb = new StringBuilder();for(int i = strs.length -1 ; i >= 0; --i){if(!strs[i].trim().equals("")){sb.append(strs[i]).append(" ");}}if(sb.length() == 0){return sb.toString();}else{return sb.substring(0, sb.length()-1);}}
Submission Result: Accepted
0 0
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