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Java Java Objects Harnessing the Power of Objects Handling Exceptions

What am i doing wrong

I tried

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);
  }
  public String getMessage() {
    try {
      kart.drive(42);
    } catch (IllegalArgumentException iae) {
    system.out.println("iae");
    }
}
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

Steven Parker
Steven Parker
229,732 Points

You're close, perhaps you can get it with just a few hints:

  • the "try" should go around the existing call to "drive" instead of adding another one
  • you don't need to create a new method
  • you'll be using the exception's "getMessage" method instead of a fixed string for the message
  • "System" needs a capital "S"