badnumberexceptiondemo.java

java编程代码

import java.util.Scanner;

public class BadNumberExceptionDemo
{

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

            System.out.println("Enter one of the numbers 42 and 24:"); 
            int inputNumber = keyboard.nextInt();

            if ((inputNumber != 42) && (inputNumber != 24))
                throw new BadNumberException(inputNumber);

            System.out.println("Thank you for entering " + inputNumber); 
        }
        catch(BadNumberException e)
        {
            System.out.println(e.getBadNumber( ) +
                                            " is not what I asked for.");
        }

        System.out.println("End of program.");
    }
}