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Java Java Objects Harnessing the Power of Objects Handling Exceptions

Michael Wheeler
Michael Wheeler
1,036 Points

Not sure how to solve this problem?

Example.java contains a program using the GoKart class we have been building (included for you to reference).

Protect the call to kart.drive by handling the IllegalArgumentException that is thrown when not enough battery remains. Print out the message from the exception to the screen as you catch the exception.

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 laps) {
      System.out.println("laps.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;
  }

}
Marcus Yow
Marcus Yow
12,929 Points

You figured it just take your getMessage() out of parenthesis.

Taylor Johnson
Taylor Johnson
14,220 Points

Yep Marcus is right but just make sure you take laps.getMessage() out of the quotation marks and not the parenthesis. Just remember that method calls don't need to be placed in " " like strings or ' ' like chars.

2 Answers

Marcus Yow
Marcus Yow
12,929 Points

My mistake it is quotation marks and not parenthesis.

J llama
J llama
12,631 Points

what a terrible disgrace and waste of time this challenge was. awful explanation the people that made this video should be ashamed