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Java Java Objects (Retired) Harnessing the Power of Objects Incrementing

Amit Dhamankar
Amit Dhamankar
4,163 Points
Posted by Amit Dhamankar
Amit Dhamankar
4,163 Points

I am still not able to solve this exercise. Our colleague gave me a Hint, but still I am not able to figure it out

Make the use of the charge method using isEmptyCharged id very confusing.

GoKart.java 
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;
  }

}

3 Answers

Steve Hunter
Steve Hunter
57,712 Points

Hi Amit,

For this, you need to modify the existing charge() method. The requirement is to increment mBarsCount only while the Kart is NOT fully charged. The condition for the while loop uses isFullyCharged but you need to negate that with the not operator. That way, once the battery is fully charged, the while loop terminates. Inside the loop, just increment mBarsCount.

Your code could look something like this:

  public void charge() {
    while(!isFullyCharged()){
      mBarsCount++;
    }
  }

I hope that helps,

Steve.

Amit Dhamankar
Amit Dhamankar
4,163 Points
Amit Dhamankar
Amit Dhamankar
4,163 Points

Hello Thanks to you Steve. I was struggling with it for 2 days. Thanks a lot

Thomas Nilsen
Thomas Nilsen
14,957 Points
Thomas Nilsen
Thomas Nilsen
14,957 Points

Okay -

change 

public void charge() {
    mBarsCount = MAX_ENERGY_BARS;
  }

to 

public void charge() {
   while(!isFullyCharged()) {
        mBarsCount++;
    }
}