Answer:

import java.util.Scanner;

public class VowelConsonantCounter {

   public static void main(String[] args) {

       Scanner scanner = new Scanner(System.in);

       System.out.println("Enter a string:");

       String inputString = scanner.nextLine().toLowerCase(); // Convert the input to lowercase for case-insensitivity

       int vowelCount = 0;

       int consonantCount = 0;

       for (int i = 0; i < inputString.length(); i++) {

           char ch = inputString.charAt(i);

           // Check if the character is an alphabet

           if (Character.isLetter(ch)) {

               // Check if the alphabet is a vowel

               if (ch == 'a' || ch == 'e' || ch == 'i' || ch == 'o' || ch == 'u') {

                   vowelCount++;

               } else {

                   consonantCount++;

               }

           }

       }

       System.out.println("Number of vowels: " + vowelCount);

       System.out.println("Number of consonants: " + consonantCount);

       scanner.close();

   }

}

Explanation:

This program uses a for loop to iterate through each character of the input string. It checks if each character is a letter, and then determines if it is a vowel or consonant. The counts are then printed at the end. Note that this program considers only English alphabets and ignores case.