Number Randomizer and Sorter (if even or odd)

Scanner input = new Scanner (System.in);

        System.out.println("Welcome to the number sorter!");

        System.out.println("The first number you enter must be smaller than the second number you enter.");

        System.out.print("Please enter a number between 0-99: ");
        double fint = input.nextDouble();

        if (fint >= 0 && fint <= 99) {

            System.out.print("Now, enter another number between 0-99: ");
            double sint = input.nextDouble();

            System.out.println("Okay, so the range is between " + fint + " and " + sint + ".");

            System.out.println("Still working on it...");

            double randomNum1 = fint + (int)(Math.random() * sint);

            double randomNum2 = fint + (int)(Math.random() * sint);

            double randomNum3 = fint + (int)(Math.random() * sint);

            System.out.println("Here are your random numbers:");

            System.out.println(randomNum1);

            System.out.println(randomNum2);

            System.out.println(randomNum3);

            double rNum1 = randomNum1 % 2;

            double rNum2 = randomNum2 % 2;

            double rNum3 = randomNum3 % 2;


            System.out.println(rNum1 == 0);

            System.out.println(rNum2 == 0);

            System.out.println(rNum3 == 0);

                } else {

            System.out.println("That number is not between 0-99.");

            System.out.print("Please enter a number between 0-99: ");

            double fint2 = input.nextDouble();


            if (fint2 >= 0 && fint2 <= 99) {

            System.out.print("Now, enter another number between 0-99: ");
            double sint2 = input.nextDouble();

            System.out.println("Okay, so the range is between " + fint2 + " and " + sint2 + ".");

            System.out.println("Still working on it...");

            double randomNum1_2 = fint2 + (int)(Math.random() * sint2);

            double randomNum2_2 = fint2 + (int)(Math.random() * sint2);

            double randomNum3_2 = fint2 + (int)(Math.random() * sint2);
            System.out.println("Here are your random numbers:");

            System.out.println(randomNum1_2);

            System.out.println(randomNum2_2);

            System.out.println(randomNum3_2);


            } else {
                System.out.println("I told you to enter a number between 0-99, but you didn't...");
                System.out.println("So now this program is shutting down.");
                System.out.println("Goodbye!");

             }
        }