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Start your free trialDavid Kirk
5,319 Pointshaving issues generating the exception...
attempting to generate exception if laps exceed MAX_BARS and not getting any luck.
public void drive(int laps) { int newLap = lapsDriven += laps; barCount -= laps; if (newLap > MAX_BARS) { throw new IllegalArgumentException("Too many laps!!!"); } lapsDriven = newLap; }
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) {
int newLap = lapsDriven += laps;
barCount -= laps;
if (newLap > MAX_BARS) {
throw new IllegalArgumentException("Too many laps!!!");
}
lapsDriven = newLap;
}
}
1 Answer
Steve Hunter
57,712 PointsHi David,
You want to see if barCount
is less than laps
(or laps
is greater than barCount
). i.e. you don't have enough bars to complete the number of laps requested. If it is, throw the error, otherwise (else
) deduct laps
from barCount
and add laps
to lapsDriven
(that's the existing lines of code).
I hope that helps,
Steve.