Help needed.

currently learning from a book and got to the point of the following
code belowand it won't compile and gives me the following error:-

run:
How old are you? 33
Exception in thread "main" java.lang.NullPointerException
Have a coupon? (Y/N) at
javaapplication5.JavaApplication5.main(JavaApplication5.java:12)
Java Result: 1
BUILD SUCCESSFUL (total time: 4 seconds)

Although I have now skipped this section and moved on I would still
love to know why I get this error:

package javaapplication5;
import java.util.Scanner;
public class JavaApplication5 {
public static void main(String[] args) {
Scanner myScanner = new Scanner(System.in);
int age;
double price = 0.00;
char reply;
System.out.print("How old are you? ");
age = myScanner.nextInt();
System.out.print("Have a coupon? (Y/N) ");
reply = myScanner.findInLine(".").charAt(0);
if (age >= 12 && age < 65) {
price = 9.25;
}
if (age < 12 || age >= 65) {
price = 5.25;
}
if (reply == 'Y' || reply == 'y') {
price -= 2.00;
}
if (reply != 'Y' && reply != 'y' &&
reply!='N' && reply!='n') {
System.out.println("Huh?");
}
System.out.print("Please pay $");
System.out.print(price);
System.out.print(". ");
System.out.println("Enjoy the show!");
    }
}