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Start your free trialFaisal Aleissa
1,992 PointsHow to solve this challenge
How to solve this challenge
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 laps) {
lapsDriven += laps;
barCount -= laps;
if (laps>barCount){
throw new IllegalArgumentException("there are not enough bars to support request");
}
lapsDriven += laps;
barCount -= laps;
}
}
1 Answer
Jennifer Nordell
Treehouse TeacherHi there! You're doing really well, but you have some repeated code in that drive
method. Take a look at the Bummer! message:
Bummer! Make sure you throw the exception before you change the barCount and lapsDriven fields.
We first want to make sure we're not asking for something impossible. If our car has 2 energy bars left and we ask it to drive 5 laps, that should not work. It's there we want to throw the exception. Only if an exception doesn't get thrown do we want to increase the lapsDriven
and decrease the barCount
.
Removing the 2 lines before your if
statement causes this to pass the challenge.
Hope this helps!