ICSE Specimen Paper 2020 - Question 9.

/**
 * Question 9 of the ICSE Specimen Paper 2020.
 * Specimen Paper: http://www.cisce.org/pdf/ICSE-Class-X-Specimen-Question-Papers-2020/Computer%20Applications_Specimen_2020.pdf
 */
import java.util.Scanner;
public class Question_9
{
    static boolean isVowel(char x) //Checks whether a character is an upper case vowel or not.
    {
        boolean check;

        if(x == 'A' || x == 'E' || x == 'I' || x == 'O' || x == 'U')
            check = true;
        else
            check = false;

        return check;
    }
    public static void main(String[] args)
    {
        Scanner sc = new Scanner(System.in);
        String a, pair;
        int i, count = 0;
        char x,y;
        boolean check1, check2;

        System.out.println("Please enter a word / phrase.");
        a = sc.nextLine().toUpperCase(); //Inputing the word / phrase and converting it into upper case.

        System.out.print("Pairs of vowels: ");

        for(i=0;i<a.length()-1;i++)
        {
            x = a.charAt(i);
            y = a.charAt(i+1);
            check1 = isVowel(x);
            if(check1 == true)
            {
                check2 = isVowel(y);
                if(check2 == true)
                {
                    pair = Character.toString(x) + Character.toString(y); //String to temporarily store the pairs.
                    System.out.print(pair + " | ");
                    count++;
                }
            }
        }

        System.out.println();
        System.out.println("Number of pairs: "+count);
        sc.close();
    }
}