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 Helper Methods

Posted by Ethan Smith
Ethan Smith
877 Points

Now create a helper method named isFullyCharged. It should return true if the GoKart is at max capacity.

Could someone help me with this i don't understand why the compiler wont work

GoKart.java 
public class GoKart {
  public static final int MAX_BARS = 8;
  private String mColor;
  private int mBarsCount;
  public boolean isBatteryEmpty () {
  return mBarsCount == 0;
  }
   public GoKart(String color) {
    mColor = color;
    mBarsCount = 0;
  }

  public String getColor() {
    return mColor;
  }

  public boolean isBatteryEmpty() {
    return mBarsCount == MAX_BARS;
  }
  public boolean isFullyCharged() {
    (mBarsCount == 8);
  }
  public void charge() {
    mBarsCount = MAX_BARS;
  }
}

1 Answer

Logan R
Logan R
22,989 Points
Logan R
Logan R
22,989 Points

You're missing your return statement for isFullyCharged. Also, you shouldn't check if the bar count is 8, you should check if it's MAX_BARS.

  public boolean isFullyCharged() {
    // You have '(mBarsCount == 8);'
    return (mBarsCount == MAX_BARS);
  }

Also, your isEmpty function seems to be wrong as well. It should be checking if it's empty, not full.

public boolean isBatteryEmpty() {
    // You have 'return mBarsCount == MAX_BARS;'
    return mBarsCount == 0;
}