Count number of words in a string

1.public class Main
{
	public static void main(String[] args) {
	    String a="My name is dolly dhote  ";
		System.out.println(a.split("\\s+").length);
	}
}

2.
class Solution 
{ 
    int countWords(String s) 
     {
        s = s.replace("\\n", " ");
        s = s.replace("\\t", " ");
        s=s.replaceAll("[ ]+"," ");
        return s.trim().split(" ").length;
}
}