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Java Java Objects (Retired) Harnessing the Power of Objects Handling Exceptions

Posted by Siddesh Gannu
Siddesh Gannu
3,565 Points

I'm not being able to catch the Exception.

I'm trying to write the Try, Catch block for this and I keep getting an error.

Main.java 
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{
      kart.drive(800);  
        System.out.println("This cant happen");
      }
      catch(IllegalArgumentException iae){
       kart.drive(40);
        System.out.println("Error");
        System.out.printf("Error is: %s\n", iae.getMessage());
      }
    }
}

2 Answers

jcorum
jcorum
71,830 Points
jcorum
jcorum
71,830 Points

Too many kart.drive() statements, you only want one, and that one in the try clause:

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

      try{
        kart.drive(800);  
        System.out.println("This cant happen");
      }
      catch(IllegalArgumentException iae){

        System.out.println("Error");
        System.out.printf("Error is: %s\n", iae.getMessage());
      }
    }
}
Siddesh Gannu
Siddesh Gannu
3,565 Points

Thanks, I thought I was on the wrong track.

Siddesh Gannu
Siddesh Gannu
3,565 Points

Also, we used multiple dispenser.load() statements in the video. I'm curious to know how that is different from my mistake here? I'm confused because in the video: dispenser.load(4); dispenser.load(2); while (dispenser.dispense()) { System.out.println("Chomp!"); } try{ dispenser.load(400); System.out.println("This will never happen"); } catch(IllegalArgumentException iae){ System.out.println("Hold up -Snoop Dog"); System.out.printf("The error was: %s\n",iae.getMessage()); }

works.

How is this different?

Thanks for the help!

jcorum
jcorum
71,830 Points
jcorum
jcorum
71,830 Points

I haven't seen the video, but apparently calls to dispenser.load(n) for some n are OK, while for others (e.g., 400) are not. In the case of the challenge, however, the instructions say "The code in Main.java is going to throw an IllegalArgumentException when the drive method is called." Not, when it's called with some particular value.

Siddesh Gannu
Siddesh Gannu
3,565 Points

Oh, ok now I understand. Thanks for the Help!