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![](https://ecs-static.teamtreehouse.com/assets/views/marketing/shared/community-banner-white-47072046c51352fe6a69f5e691ff5700b28bb11d45197d7bdf066d9ea3f72d0c.webp)
![Errol Katz](https://secure.gravatar.com/avatar/bd059899f3ed461db3c07b81184061bf?s=96&d=https%3A%2F%2Fecs-static.teamtreehouse.com%2Fassets%2Fcontent%2Fdefault_avatar-445fbbabfc8dc9188fb5967fe43322ee0c3e0dd1e10f378bf8343784af5a13eb.webp&r=pg)
Errol Katz
Courses Plus Student 533 PointsHow do I create drive method, increment lapsDriven variable by 1 and ensure return type is void with correct syntax?
What kind on public method do I need to perform this task? Boolean? And how can I make sure return type is void. And what is the ideal syntax for performing this task?
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;
}
private int lapsDriven;
public boolean drive() {
lapsDriven++;
}
public void charge() {
barCount = MAX_BARS;
}
public boolean isBatteryEmpty() {
return barCount == 0;
}
public boolean isFullyCharged() {
return MAX_BARS == barCount;
}
}
1 Answer
![Yanuar Prakoso](https://secure.gravatar.com/avatar/b629c57b15ad53afe24e8da9549b96df?s=96&d=https%3A%2F%2Fecs-static.teamtreehouse.com%2Fassets%2Fcontent%2Fdefault_avatar-445fbbabfc8dc9188fb5967fe43322ee0c3e0dd1e10f378bf8343784af5a13eb.webp&r=pg)
Yanuar Prakoso
15,196 PointsHi Errol
What you need is a public void method because it did not return anything (void). Here how it should be:
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;
}
private int lapsDriven;//<-- I suggest you group the class' fields in the top part of the class
//public boolean drive() {//<-- this is supposed to be void not boolean, like this:
public void drive() {
lapsDriven++;
}
public void charge() {
barCount = MAX_BARS;
}
public boolean isBatteryEmpty() {
return barCount == 0;
}
public boolean isFullyCharged() {
return MAX_BARS == barCount;
}
}
I hope this can help a little