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Java Java Objects Harnessing the Power of Objects Handling Exceptions

Posted by Jordan Polk
Jordan Polk
3,131 Points

Preview console is printing my error message, I'm using iae's getMessage method, but I'm still getting a Bummer!

Everything appears to be working as expected, but I'm still wrong somehow. Anyone have any solutions?

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");
    }
    try {
      kart.drive(42);
    } catch (IllegalArgumentException iae) {
      System.out.println("Hold up.");
      System.out.printf("Error: %s", 
                        iae.getMessage());
    }
  }
}
GoKart.java 
class GoKart {
  public static 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) {
    if (laps > barCount) {
      throw new IllegalArgumentException("You have driven too many laps.");
    }
    lapsDriven += laps;
    barCount -= laps;
  }

}
samiff
samiff
31,206 Points

Hi Jordan, your following code has the correct logic. Did you per chance change the exception's string message You have driven too many laps.? It remembers it from the previous exercise and if you change that your answer may fail. In any case, you can hit the "Restart" button on the code challenge, that way you can check inside the GoKart.java file, but you shouldn't need to change its contents for this challenge.

try {
  kart.drive(42);
} catch (IllegalArgumentException iae) {
  System.out.println("Hold up.");
  System.out.printf("Error: %s", iae.getMessage());
}

1 Answer

Caleb Kleveter
Caleb Kleveter
Treehouse Moderator 37,862 Points

I noticed that the your drive method throws a different error then the default method when the challenge starts.

You are throwing this error:

IllegalArgumentException("You have driven too many laps.");

You should be throwing this error:

IllegalArgumentException("Not enough battery remains");

The text makes a difference.