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kalyada leosrisook
Courses Plus Student 17,855 PointsCould anyone help me get start on this task?
This is the task goal : '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. Let's use the ! symbol and a while loop. Inside the loop increment mBarsCount.'
I've been stuck in this task for a while now. I do not know how to get started. Mainly because I don't understand the question. Could anyone help me to start this ?
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() {
return mBarsCount == MAX_ENERGY_BARS;
}
}
5 Answers
Blake Larson
13,014 PointsFernando.. You don't need the mBarsCount == 0; line. The helper method isFullyCharged() will check that variable for you which is what you are using in the while loop.
public void charge() {
while(!isFullyCharged()) { /// This loop is saying, as long as when you call isFullyCharged() and mBarsCount isn't full, enter the loop and increment. When it increments it will check the while statement again, and so on. When you increment it to it's full charge this loop will stop.
mBarsCount++;
}
}
Blake Larson
13,014 PointsYou are gonna want to use the "while (!isFullyCharged()) { increment }" in the charge method.
Chris Tvedt
3,795 PointsThe task is to make it so that when you charge the battery, it will charge until it is full. So it will iterate over the battery variable until it is at MAX_BARS, then it will quit the loop and stop charging. So:
while (is not fullyCharged()) { increment battery value; }
If the battery is then not == to MAX_BARS it will increment the battery value until the battery value == MAX_BARS.
Tried answering this without giving away all of the answer, please let me know if you got it working :-)
Fernando Martinez
Android Development Techdegree Student 921 Pointswhile(!isFullyCharged()){ mBarsCount++; } return mBarsCount == MAX_ENERGY_BARS;
I only have an error that's say tray again
Blake Larson
13,014 PointsFernando.. The method is void. There is nothing to return.
Fernando Martinez
Android Development Techdegree Student 921 PointsPublic void charge (){ mBarsCount == 0; while(!isFullyCharged()){ mBarsCount++; } } This is your answer ;D
Fernando Martinez
Android Development Techdegree Student 921 Pointsyes, Blake you are wright I wrote from what I remember from that exercise.