Vowel consonant counter

package javaapplication98;
import java.util.*;
/**
 *
 * @author Student
 */
public class JavaApplication98 {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
    Scanner scan=new Scanner (System.in);
    System.out.print("Enter Word: ");
    String line = scan.nextLine();
    int vowels = 0, consonants = 0, digits = 0, spaces = 0;
    line = line.toLowerCase();
    for(int i = 0; i < line.length(); ++i){
            char ch = line.charAt(i);
            if(ch == 'a' || ch == 'e' || ch == 'i'
                || ch == 'o' || ch == 'u') {
                ++vowels;
            }
            else if((ch >= 'a'&& ch <= 'z')) {
                ++consonants;
            }
        }
        System.out.println("Vowels: " + vowels);
        System.out.println("Consonants: " + consonants);
    }

}