public class Solution {
public int countSegments(String s) {
if (s == null || s.length() < 1) return 0;
int res = 0;
int len = s.length();
for (int i = 0; i < len; i++) {
if (s.charAt(i) != ' ' && (i == 0 || s.charAt(i - 1) == ' ')) {
res++;
}
}
return res;
}
}
/*
"Hello, my name is John"
"apple "
" apple"
*/