LeetCode 434 - Number of Segments in a String

http://bookshadow.com/weblog/2016/12/04/leetcode-number-of-words-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.

For example,

Input: "Hello, my name is John"

Output: 5

https://discuss.leetcode.com/topic/70642/clean-java-solution-o-n

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

https://discuss.leetcode.com/topic/70656/ac-solution-java-with-trim-and-split

public int countSegments(String s) {
    String trimmed = s.trim();
    if (trimmed.length() == 0) return 0;
    else return trimmed.split("\\s+").length;
}