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 Overload Methods

Joshua Thao
Joshua Thao
6,439 Points

How to pass in 1 as a default for my method overload?

I'm not understanding this question correctly. It never said for me to delete my old drive method(), it wanted me to create a new drive method with no parameters? And add a method passing 1 for the default?

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 void drive() {
    lapsDriven = 1;
  }
  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() {
    lapsDriven++;
    barCount--;
  }

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


}

1 Answer

Steven Parker
Steven Parker
231,198 Points

Your code technically does the right thing, but not in the way the challenge asked for.

When they say, "It should call the newer drive method passing in a 1 for the default.", they mean instead of making changes to the variables directly, just call the other version of "drive" (the one that now takes an argument) and give it the value 1 as the argument.

Joshua Thao
Joshua Thao
6,439 Points

Ahh I didn't know you can just throw the value into the method without declaring variables.