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 Harnessing the Power of Objects Increment and Decrement

Posted by Ernest Umeh
Ernest Umeh
1,255 Points

Can someone help me with this? I wasn't told to create a new drive method...

I don't get why it says "In your newly created drive method" when I didn't create one...

GoKart.java 
class GoKart {
  public static final int MAX_BARS = 8;
  private String color;
  private int barCount;

  public GoKart(String color) {
    this.color = color;
  }

  public String getColor() {
    return color;
  }

  public void charge() {
    barCount = MAX_BARS;
  }

  private int lapsDriven;

  public boolean drive() {
  boolean lapsDriven = false;
    if (!isFullyCharged()) {
    barCount--;
      lapsDriven = true;
    }
    return void lapsDriven;
  }

  public boolean isBatteryEmpty() {
  }

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

1 Answer

Frank Torchia
Frank Torchia
18,346 Points
Frank Torchia
Frank Torchia
18,346 Points

Hi Ernest,

I'm seeing a method named drive in your code that you provided. Is that one that you made or was it already there? I loaded up the challenge, and when I got to that portion there wasn't a drive method. The instructions then say:

Great! Now let's write a simple drive method. It should be public and not return anything. We'll start out basic, calling the drive method will make the GoKart drive a single lap.

In your newly created drive method, increment the new lapsDriven variable by 1. Use the incrementing shorthand to increase lapsDriven.

If you did not create that method you might want to reset the challenge to make sure you're starting on a fresh slate.