434. Number of Segments in a String

题目：

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

链接：https://leetcode.com/problems/number-of-segments-in-a-string/#/description

3/25/2017

 1 public class Solution {
 2     public int countSegments(String s) {
 3         boolean inSegment = false;
 4         int count = 0;
 5         for (int i = 0; i < s.length(); i++) {
 6             if (s.charAt(i) == ' ') {
 7                 if (inSegment) inSegment = false;
 8             } else {
 9                 if (!inSegment) {
10                     inSegment = true;
11                     count++;
12                 }
13             }
14         }
15         return count;
16     }
17 }

别人的精简版

1 public int countSegments(String s) {
2     int res=0;
3     for(int i=0; i<s.length(); i++)
4         if(s.charAt(i)!=' ' && (i==0 || s.charAt(i-1)==' '))
5             res++;        
6     return res;
7 }