434. Number of Segments in a String
Description Submission Solutions
- Total Accepted: 13229
- Total Submissions: 35604
- Difficulty: Easy
- Contributors: love_FDU_llp
Count the number of segments in a string, where a segment is defined to be a contiguous sequence of non-space characters.
Please note that the string does not contain any non-printable characters.
Example:
Input: "Hello, my name is John" Output: 5
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【题目分析】
求一个字符串不包含空字符的子串有多少个。
【思路】
1. 使用Srtring.spilt方法。split方法需要特别注意的一点是，如果字符串的头部与split传入的字符串正好匹配，那么结果会多返回一个空字符串。而在尾部出现则不会出现这种情况。
【java代码】
1 public class Solution { 2 public int countSegments(String s) { 3 if(s == null) return 0; 4 s = s.trim(); 5 if(s.length() == 0) return 0; 6 7 return s.split("\s+").length; 8 } 9 }