I need help on a practice code for java

[Sageinquisitor]

Code:

import java.util.Scanner;

class Helpful {
	
	public static void main(String args[]) {
		Scanner myScanner = new Scanner(System.in);
		int age;
		double price = 0.00;
		char reply;
		boolean isKid, isSenior, hasCoupon, hasNoCoupon;
		
		System.out.print("How old are you? ");
		age = myScanner.nextInt();
		
		System.out.print("Have a coupon? (Y/N) ");
		reply = myScanner.findInLine(".").charAt(0);

		isKid = age < 12;
		isSenior = age >= 65;
		hasCoupon = reply == 'Y' || reply == 'y';
		hasNoCoupon = reply == 'N' || reply == 'n';
		
		if (!isKid && !isSenior) {
			price = 9.25;
		}
		if (isKid || isSenior) {
			price = 5.25;
		}
		
		if (hasCoupon) {
			price -= 2.00;
		}
		if (!hasCoupon && !hasNoCoupon) {
			System.out.println("Huh?");
		}
		
		System.out.print("Please pay $");
		System.out.print(price);
		System.out.println(".");
		System.out.println("Enjoy the movie!");
	}
}

// below is wat comes up when i hit execute (i type the 34 and hit enter, and the next thing that comes up should make me chose between 'Y' and 'N' but it doesn't)

Quote:

How old are you? 34
Have a coupon? (Y/N) Exception in thread "main" java.lang.NullPointerException
at Helpful.main(Helpful.java:16)

Process completed.

[Sageinquisitor]

also, i didn't know how to put it on forums without the indents being taken out, so sorry about that.

[JavaBean]

Quote:

also, i didn't know how to put it on forums without the indents being taken out, so sorry about that.

You just put it inside [code] tag like this: [ code ] your code .. [ / code] (without spaces!)

[Sageinquisitor]

how do i fix wat i have up there?

[JavaBean]

You can try:

Code:

String reply = myScanner.nextLine();
if (reply.charAt(0) == 'Y') hasCoupon = true;
else hasCoupon = false;

instead of:

Code:

reply = myScanner.findInLine(".").charAt(0);

hasCoupon = reply == 'Y' || reply == 'y';
hasNoCoupon = reply == 'N' || reply == 'n';

[Sageinquisitor]

didn't work, but ty anyway

[Sageinquisitor]

is there any way to get rid of the nullpointerexception? i think that's wat it is

[JavaBean]

Code:

reply = myScanner.findInLine(".").charAt(0);

In this line, if findInLine method returns null then calling charAt method of a null object reference will return you a NullPointerException! This is why i suggested you to do that in another way.

[Sageinquisitor]

ooo, i see

[Sageinquisitor]

well, i just took out that line and everything that goes with it with /*-*/ and it still has the nullpointerexception, so im thinking that maybe it isn't the problem

[JavaBean]

Try this:

Code:

if (myScanner.findInLine(".") == null) System.out.println("This line is the problem");