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Java Java Objects Harnessing the Power of Objects Throwing Exceptions

Syed Faraz Ahmed
Syed Faraz Ahmed
586 Points
Posted by Syed Faraz Ahmed
Syed Faraz Ahmed
586 Points

Error in throwing exception.

public void drive(int laps) { if (laps > MAX_BARS){ throw new IllegalArgumentException("Battery Dead!"); } lapsDriven += laps; barCount -= laps; }

GoKart.java 
class GoKart {
  public static final int MAX_BARS = 8;
  private String color;
  private int barCount;
  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 barCount == MAX_BARS;
  }

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

  public void drive(int laps) {
    if (laps > MAX_BARS){
        throw new IllegalArgumentException("Battery Dead!");
      }
    lapsDriven += laps;
    barCount -= laps; 
  }
}

1 Answer

Umesh Ravji
Umesh Ravji
42,386 Points
Umesh Ravji
Umesh Ravji
42,386 Points

Hi Syed Faraz Ahmed, you need to change your condition to check against the value of barCount rather than MAX_BARS, since it is the barCount property that stores the current battery level.

if (laps > barCount) {
  throw new IllegalArgumentException();
}