백준(1152) JAVA - 단어의 개수

import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		
		Scanner sc = new Scanner(System.in);
		
		String str = sc.nextLine();
		String ar[] = str.split(" ");
		int cnt = 0;
		
		for(int i = 0 ; i < ar.length; i++) {
			if(ar[i].equals("") || ar[i] == null) {
				cnt++;
			}
		}
		System.out.println(ar.length - cnt);
	}

}