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

Johannes Pedersen
Johannes Pedersen
1,006 Points
Posted by Johannes Pedersen
Johannes Pedersen
1,006 Points

I cannot see how my code would be wrong, i make an overloaded method drive, call the other and set it to increment by 1

Pretty much.

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 hmLaps) {
    hmLaps += lapsDriven;
    hmLaps -= barCount;
  }

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

1 Answer

andren
andren
28,558 Points
andren
andren
28,558 Points

You have indeed added the correct drive method, but you have actually added it twice. One above the original drive method and one below:

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

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

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

Defining a method with the same signature twice is not allowed. And you also seem to have accidentally removed the ending } bracket of the class while doing so.

If you remove the drive() method at the bottom and add the closing bracket back again like this:

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 hmLaps) {
    hmLaps += lapsDriven;
    hmLaps -= barCount;
  }
}

Then your code will pass.

Johannes Pedersen
Johannes Pedersen
1,006 Points
Johannes Pedersen
Johannes Pedersen
1,006 Points

Thanks, i mustve added the 3. drive() out of frustration. The real problem was the removed curly bracket to end the class ..