[LC] 434. Number of Segments in a String

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-printablecharacters.

Example:

Input: "Hello, my name is John"
Output: 5

 

class Solution {
    public int countSegments(String s) {
        if (s == null || s.length() == 0) {
            return 0;
        }
        int res = 0;
        for (int i = 0; i < s.length(); i++) {
            if (s.charAt(i) != ' ' && (i == 0 || s.charAt(i - 1) == ' ')) {
                res += 1;
            }
        }
        return res;
    }
}