Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

Java Java Objects Harnessing the Power of Objects Handling Exceptions

sophiko gurabanidze
sophiko gurabanidze
1,291 Points
Posted by sophiko gurabanidze
sophiko gurabanidze
1,291 Points

hey, please help in challenge "handling exceptions"

I have following error - Bummer: Make sure you print out the error message to the console using the exception's getMessage method. but in preview everything seems right, what am I doing wrong?

Example.java 
class Example {

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

  try { kart.drive(42); 
       System.out.println("it will never happen");
    } catch (IllegalArgumentException iae) 
  { 
    System.out.println("whoa");

       System.out.printf( "the error was %s" ,
                         iae.getMessage()); 
                                           }
     }
}
GoKart.java 
class GoKart {
  public  final int MAX_BARS = 8;
  private int barCount;
  private String color;
  private int lapsDriven;

  public GoKart(String color) {
    this.color = color;
  }

  public String getColor() {
    return color;
  }

  public void charge() {
    barCount = MAX_BARS;
  }

  public boolean isBatteryEmpty() {
    return barCount == 0;
  }

  public boolean isFullyCharged() {
    return MAX_BARS == barCount;
  }

  public void drive() {
    drive(1);
  }

  public void drive(int laps) {
    int newLapsDriven=lapsDriven+laps;
    int newBarCount=barCount-laps;
    if (newLapsDriven>MAX_BARS||newBarCount>MAX_BARS) {
      throw new IllegalArgumentException( "not enough Battery");
    }
    lapsDriven=newLapsDriven;
    barCount=newBarCount;
  }

}