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Java Java Objects Harnessing the Power of Objects Handling Exceptions

Mark Steffensen
Mark Steffensen
4,148 Points

Told to put the "Try" loop around the kart.drive method, despite it encapsulating it. Anything I am doing wrong?

Hey folks. Stuck on this challenge and I am at a loss for what I did wrong. Any idea?

Example.java
class Example {

  public static void main(String[] args) {
    GoKart kart = new GoKart("purple");
    if (kart.isBatteryEmpty()) { 
      System.out.printf("The battery is empty");
    }
  try{
      kart.drive(90);}
  catch (IllegalArgumentException iae) {
    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("Not enough battery remains");
    }
    lapsDriven += laps;
    barCount -= laps;
  }

}

2 Answers

andren
andren
28,521 Points

The problem is that you have changed the value that is passed to the drive method. Originally the method call looks like this:

kart.drive(42);

You have changed 42 to 90 which confuses the code checker, changing any code you are not instructed to change is generally a bad idea in these challenges. If you change it back to 42 then your code will pass.

Mark Steffensen
Mark Steffensen
4,148 Points

Yep that worked. Thank you Andren! I will try to stick to the formula for now on.