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Andrei Musat
738 PointsMake sure you throw a new IllegalArgumentException if the requested amount of laps would make the battery less than zer
I got stuck here ,can someone clear my mind I tried many ways but couldn´t go forward...
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 totalLapsToGo=barCount-=laps;
if (barCount>totalLapsToGo){
throw new IllegalArgumentException ("Sorry, too many laps.");
}
lapsDriven += laps;
barCount -= laps;
}
}
1 Answer
Chris Jones
Java Web Development Techdegree Graduate 23,933 PointsHey Andrei,
Good try, but there's no need for the totalLapsToGo variable. You just need to test if the laps parameter is greater than the barCount field. So, all you need is:
public void drive(int laps) {
if (barCount < laps) {
throw new IllegalArgumentException();
} else {
lapsDriven += laps;
barCount -= laps;
}
}
I hope that helps! Let me know if you have any more questions!
Andrei Musat
738 PointsThank you for the help !
Andrei Musat
738 PointsAndrei Musat
738 Pointsclass 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; int maxLaps= lapsDriven+=laps; /I also tried with lapsDriven-=laps; I´ve got the same error message/ if(maxLaps>MAX_BARS){ throw new IllegalArgumentException("Too many laps requested"); } barCount=maxLaps; } }