Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

Java Java Objects (Retired) Harnessing the Power of Objects Throwing Exceptions

jatinder kumar
PLUS
jatinder kumar
Courses Plus Student 4,886 Points

whats wrong with this code, its not getting passed

if(laps>mBarsCount) { throw new IllegalArgumentException("Not enough battery remains"); }

GoKart.java
public class GoKart {
  public static final int MAX_BARS = 8;
  private String mColor;
  private int mBarsCount;

  public GoKart(String color) {
    mColor = color;
    mBarsCount = 0;
  }

  public String getColor() {
    return mColor;
  }

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

  public void drive(int laps) {
    // Other driving code omitted for clarity purposes
    mBarsCount -= laps;

    if(laps>mBarsCount)
    {
      throw new IllegalArgumentException("Not enough battery remains");
    }
  }

  public void charge() {
    while (!isFullyCharged()) {
      mBarsCount++;
    }
  }

  public boolean isBatteryEmpty() {
    return mBarsCount == 0;
  }

  public boolean isFullyCharged() {
    return mBarsCount == MAX_BARS;
  }

}

1 Answer

Jennifer Nordell
seal-mask
STAFF
.a{fill-rule:evenodd;}techdegree
Jennifer Nordell
Treehouse Teacher

Hi there! It's not so much that the code is wrong but rather that it's a little out of order. In fact, you're so close here I'm not even going to give the direct answer. I'm just going to tell you how the logic of that is working. Right now when the function executes the first thing it does is reduce the mBarsCount. It does this before it even checks if there's enough battery :smiley: Try putting that reduction to mBarsCount in the proper place. You've got this! :sparkles: