CountCharacters.java

import java.util.Scanner;

public class CountCharacters {
 
 public static void main(String[] args) {
 
 Scanner scn = new Scanner(System.in);
 String str = scn.nextLine();

 int vowels = 0, consonants = 0, digits = 0, special = 0;

 for (char ch : str.toCharArray()) {
 if(Character.isLetter(ch)){
 ch = Character.toLowerCase(ch);

 if(ch == 'a' || ch == 'e' || ch == 'i' || ch == 'o' || ch == 'u'){
 vowels++;
 }else{
 consonants++;
 }
 }else if(Character.isDigit(ch)){
 digits++;
 }else{
 special++;
 }
 }

 System.out.println("Vowels = " + vowels);
 System.out.println("Consonants = " + consonants);
 System.out.println("Digits = " + digits);
 System.out.println("Special Characters = " + special);
 }
}