Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

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

Posted by Furquan Ahmad
Furquan Ahmad
5,148 Points

Why won't my loop work ?

I thought you have to make sure the battery isn't fully charged so you do the !. then increment mBarsCount

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 +1;
    }
    return mBarsCount == MAX_ENERGY_BARS;
  }

1 Answer

Steve Hunter
Steve Hunter
57,712 Points

Hi there,

You have put the code to charge the Kart in the isFullyCharged method. It should be in charge.

Make sense? 

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

  public boolean isFullyCharged() {
    return mBarsCount == MAX_ENERGY_BARS;
  }
}

Steve.

Furquan Ahmad
Furquan Ahmad
5,148 Points

Thank you, it makes sense, if the battery isn't fully charged then charge it by + 1 until it is fully charged

Steve Hunter
Steve Hunter
57,712 Points

Absolutely, yes. The isFullyCharged() helper method is fine as it is.