Welcome to the Treehouse Community

The Treehouse Community is a meeting place for developers, designers, and programmers of all backgrounds and skill levels to get support. Collaborate here on code errors or bugs that you need feedback on, or asking for an extra set of eyes on your latest project. Join thousands of Treehouse students and alumni in the community today. (Note: Only Treehouse students can comment or ask questions, but non-students are welcome to browse our conversations.)

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community. Start your free trial today.

Java Java Objects Harnessing the Power of Objects Throwing Exceptions

Please help what wrong with my exception

I dont unterstand why it doesnt work

if lapsDriven bigger than the barCount then we cant drive anymore. Thats what my code does or not

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 MAX_BARS == barCount;
  }

  public void drive() {
    drive(1);

  }

  public void drive(int laps) {
    lapsDriven += laps;
    barCount -= laps;

    if(lapsDriven > barCount){
    throw new IllegalArgumentException(" Your Batterie is to low to continue");
    }
  }
}

2 Answers

Michelle Bramlett
Michelle Bramlett
1,253 Points

Hello Nikolai,

I'm new at responding so hope I can help!

When I worked this challenge, this is how I laid out the last portion

public void drive(int laps) { if (laps > barsCount) { throw new IllegalArgumentException("Not enough battery remains"); } barsCount -= laps; }

Hope this helps!

Michelle

Craig Dennis
STAFF
Craig Dennis
Treehouse Teacher

You don't want to change things before you check do you? Then you'll get things in a weird state.

Let me know if that hint did it for ya.