Welcome to the Treehouse Community

The Treehouse Community is a meeting place for developers, designers, and programmers of all backgrounds and skill levels to get support. Collaborate here on code errors or bugs that you need feedback on, or asking for an extra set of eyes on your latest project. Join thousands of Treehouse students and alumni in the community today. (Note: Only Treehouse students can comment or ask questions, but non-students are welcome to browse our conversations.)

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community. Start your free trial today.


Help with TreeHouse Challenge

I have been tasked this: The code in Main.java is going to throw an IllegalArgumentException when the drive method is called. Catch it and warn the user.

this is what i added to my code:

public class Main { public static void main(String[] args) { GoKart kart = new GoKart("yellow"); if (kart.isBatteryEmpty()) { System.out.println("The battery is empty"); } kart.drive(2);

   try {
  } catch (IllegalArgumentException iae) {
    System.out.println("Whoa There!");
    System.out.printf("The error was: %s\n", iae.getMessage());



But im getting: Bummer! Looks like you didn't catch the exception.

How can i fix this and why does my code not work.

2 Answers

David Renger
David Renger
934 Points

You have to first throw a new IllegalArgumentException("Message"); before you write a try catch statement. Otherwise iae.getMessage() won't work.

i have thrown a new IllegalArgumentException i just need to catch it now.

Durim Kryeziu
Durim Kryeziu
14,002 Points

Hello Mehrdad,

You have to collapse both kart.drive(2) and kart.drive(10), because the drive() method is the "problematic" method!

Let me know if that worked ? Thanks

what do you mean by collapse? Do you mean to replace them both with kart.drive(12); ?