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

Create a new method named drive that accepts no arguments.

I'm stuck on this.

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;
        this.lapsDriven = 0;
    }

    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 int getBarCount() {
        return this.barCount;
    }

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

    public int getLapDriven() {
        return this.lapsDriven;

    }
}

1 Answer

Rachel Johnson
STAFF
Rachel Johnson
Treehouse Teacher

Hey Chance Edward ! Thanks for reaching out.

Here we simply need to overload the existing drive method by initializing another one.

In the previous video at around the 4:15 mark we see Craig creating a second fill() method above the first one with no arguments. This method calls the original fill() method and passes it an argument.

We just have to do a similar thing for the challenge:

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

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

The first drive method overloads the second one (the one with the int laps parameter)

I hope that helps!

Thank you :D