Question

Java: Assume letters A E O U I as the vowels. Write a program that prompts the user to enter a string and displays the number of vowels and consonants in the string. The same vowels or consonants are counted only once. Use sets in the code.

Answer 1

//Main.java
import java.util.HashSet;
import java.util.Scanner;
import java.util.Set;
public class Main {
  public static void main(String [] args) {
    Set<Character> hash_Set = new HashSet<Character>();
    Scanner scanner = new Scanner(System.in);
    System.out.print("Enter string: ");
    String s = scanner.nextLine();

    for(char ch: s.toCharArray()){
      hash_Set.add(ch);
    }

    int vowels = 0, cons = 0;

    for (char ch : hash_Set) {
      if ((ch >= 'A' && ch <= 'Z') || ((ch >= 'a' && ch <= 'z'))) {
        if (ch == 'a' || ch == 'e' || ch == 'i' || ch == 'o' || ch == 'u' || ch == 'A' || ch == 'E' || ch == 'I' || ch == 'O' || ch == 'U') {
          vowels++;
        } else {
          cons++;
        }
      }
    }

    System.out.println("Vowels count = " + vowels);
    System.out.println("Consonants count = " + cons);

  }
}