import java.util.ArrayList;
import java.util.Scanner;



public class Test {
    public static void main(String[] args) {
        // Creating an array with the allowed int values
        ArrayList<Integer> allowedValues = new ArrayList<Integer>();
        allowedValues.add(0);
        allowedValues.add(1);
        allowedValues.add(2);
        allowedValues.add(3);

        Scanner scan = new Scanner(System.in);
        // Declaring chosenInt (your selection) outside while loop so it can be used outside of the while loop.
        int chosenInt;
        // !scan.hasNextInt() checks if the next input to the scanner is an int, and the ! inverses the value, so true will be false and false will be true.
        // !allowedValues.contains checks if the value sent to the method is in the arraylist, and inverses the value.
        while(!scan.hasNextInt() || !allowedValues.contains((chosenInt = scan.nextInt()))) {
            scan.nextLine();
            System.out.println("Incorrect input, want a number between 0 and 3");
        }
        System.out.println(chosenInt);
    }
}