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

Chidiebere Ekennia
Chidiebere Ekennia
5,950 Points

Don't know how to do this challenge: Create a new method named drive that accepts no arguments.

I'm not sure what to do next. any help?

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(MAX_BARS)
  }


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

2 Answers

Daniel Turato
seal-mask
PLUS
.a{fill-rule:evenodd;}techdegree seal-36
Daniel Turato
Java Web Development Techdegree Graduate 30,124 Points

So you need to create a separate new drive method that takes 0 parameters/arguments. This method then should call the original drive method by passing in 1 as it's parameter. This concept is called method overloading, you can read more about it here - https://docs.oracle.com/javase/tutorial/java/javaOO/methods.html. With that being said, this is what I got:

public void drive() {
    drive(1);
} 
Chidiebere Ekennia
Chidiebere Ekennia
5,950 Points

Thanks, tho i had to assign MAX_BARS = 1 inside the drive method : public void drive() { drive(MAX_BARS = 1); }