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Java Java Objects Harnessing the Power of Objects Handling Exceptions

Milena Petrova
Milena Petrova
2,617 Points

Protect the call to kart.drive by handling the IllegalArgumentException that is thrown when not enough battery remains.

What am I doing wrongg??

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(42);
  }
   try { 
  kart.drive(42); 
  } catch (IllegalArgumentException iae) { 
  System.out.println(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("Not enough battery remains");
    }
    lapsDriven += laps;
    barCount -= laps;
  }

}

1 Answer

samiff
samiff
31,206 Points

Hi Milena,

Your code logic is good, but you just have some misplaced brackets.

  // kart.drive(42);
  }    <---- extra bracket should not be here

Balance out your brackets and you're code will pass the challenge. If you hit the Preview button, it will try and tell you what the error was. Hope that helps.