count words in java

/**
 * @author lautturi.com 
 * Java example:
 */

import java.util.*;

public class Lautturi {
	public static void main(String[] args) {
	
		String str = "hello lautturi java world!";
		int words =  (str.split("\\s+")).length;
		System.out.println("words number:" + words);
	}
}

output:

words number:4