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Start your free trialAdmire Dhodho
5,411 PointsOkay, so let's throw an IllegalArgumentException from the drive method if the requested number of laps cannot be complet
Okay, so let's throw an IllegalArgumentException from the drive method if the requested number of laps cannot be completed on the current battery level. Make the exception message "Not enough battery remains" pliz help?
public class GoKart {
public static final int MAX_BARS = 8;
private String mColor;
private int mBarsCount;
public GoKart(String color) {
mColor = color;
mBarsCount = 0;
}
public String getColor() {
return mColor;
}
public void drive() {
drive(1);
}
public void drive(int laps) {
// Other driving code omitted for clarity purposes
int newLaps = mBarsCount - laps;
if ( newLaps > MAX_BARS)
{
throw new IllegalArgumentException("Not enough battery remains");
}
}
public void charge() {
while (!isFullyCharged()) {
mBarsCount++;
}
}
public boolean isBatteryEmpty() {
return mBarsCount == 0;
}
public boolean isFullyCharged() {
return mBarsCount == MAX_BARS;
}
}
4 Answers
Alexander Rose
3,376 PointsYour newLaps variable represents the amount of bars after having driven the given number of laps. You want to compare this variable to 0, not the maximum amount of bars. If newLaps is less than zero, that means we didn't have enough bars to drive the given amount of laps, so throw the exception. If not, decrease mBars by the amount of laps.
Jakob Pupke
3,025 PointsAlexander is right. You need to check if newLaps is greater than mBarsCount.
if ( newLaps > mBarsCount ) {
throw new IllegalArgumentException("Not enough battery remains");
}
else {
// is charged enough, substract newLaps from mBarsCount
mBarsCount -= newLaps;
}
Admire Dhodho
5,411 Pointsstill failing to break it
Teferi Heye
3,448 Points `html
<p>public class GoKart {
public static final int MAX_BARS = 8;
private String mColor;
private int mBarsCount;
public GoKart(String color) { mColor = color; mBarsCount = 0; }
public String getColor() { return mColor; }
public void drive() { drive(1); }
public void drive(int laps) { // Other driving code omitted for clarity purposes int currentLaps= mBarsCount-laps; if (currentLaps<0){ throw new IllegalArgumentException("Not Enough Battery remains"); } }
public void charge() { while (!isFullyCharged()) { mBarsCount++; } }
public boolean isBatteryEmpty() { return mBarsCount == 0; }
public boolean isFullyCharged() { return mBarsCount == MAX_BARS; }
}</p>
`
Admire Dhodho
5,411 PointsAdmire Dhodho
5,411 Pointsm still stuck guys