Question

write a java app that ensures the user enters a valid speed, from 40-65 (use try...catch to ensure int values)

Answer 1

import java.util.Scanner;

public class ValidSpeed {

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);

        int speed;
        while (true) {
            try {
                System.out.print("Enter a speed(40-65): ");
                speed = Integer.parseInt(in.nextLine());
                if (speed >= 40 && speed <= 65)
                    break;

                System.out.println("Speed is not in valid range. Try again!");
            } catch (Exception e) {
                System.out.println("That was not an integer. Try again!");
            }
        }
        System.out.println("Valid speed entered was " + speed);

        in.close();
    }
}