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Start your free trialTemitope Isaac Akintunde
556 PointsPlease i am lost with the question after the lesson on Incrementing and Decrementing.
I don't seem to understand how to go about with the solution. thank you
public class GoKart {
public static final int MAX_ENERGY_BARS = 8;
private String mColor;
private int mBarsCount;
public GoKart(String color) {
mColor = color;
mBarsCount = 0;
}
public String getColor() {
return mColor;
}
public void charge() {
mBarsCount = MAX_ENERGY_BARS;
}
public boolean isBatteryEmpty() {
return mBarsCount == 0;
}
public boolean isFullyCharged() {
while (!isFullyCharged){
mBarsCount++;
}
return mBarsCount == MAX_ENERGY_BARS;
}
}
2 Answers
Steve Hunter
57,712 PointsHi there,
For this part ofthe challenge, you are asked:
Okay, so let's use our new isFullyCharged helper method to change our implementation details of the charge method. Let's make it so it will only charge until the battery reports being fully charged.
So, we want to amend the exiting charge
method. At the moment, this method just sets mBarsCount
to be MAX_ENERGY_BARS
. The clue to what the new method should do is given as: Let's use the ! symbol and a while loop. Inside the loop increment mBarsCount. So now we know why the idea is behind the amendment. We want to increment mBarsCount
while
the helper method, isFullyCharged()
is reporting that that battery is not fully charged.
Let's consider the contents of the while
loop. The clue says to increment mBarsCount
, so let's start with that:
while (//something){
mBarsCount++;
}
So far, so good! But what are we testing inside the loop condition? We want to know if the battery is NOT full. But we only have one helper method. That tells us when the battery is full - we want the opposite, right? That means we can negate the output of the isFullyCharged()
method using the !
operator. We just need to insert that test into the while
loop:
public void charge(){
while (!isFullyCharged()){
mBarsCount++;
}
}
I hope that helps,
Steve.
Shreyas Ananth
861 Pointsplease elaborate your question... which part of code didnt you understand.. what are you trying to achieve?
Temitope Isaac Akintunde
556 PointsTemitope Isaac Akintunde
556 PointsThank you so much steve This is so very helpful and your detailed explanation gave me a better and broad understanding Thanks again
Steve Hunter
57,712 PointsSteve Hunter
57,712 PointsNo problem!