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

Oliver Løye
Oliver Løye
3,969 Points
Posted by Oliver Løye
Oliver Løye
3,969 Points

HELP - Java Objects - Incrementing and Decrementing - Challenge!

The challenge goes like this:

"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 have seen the previous video 5 times but I'm still stuck.. :-(

Can anyone help me?

My while loop is:

while(!isFullyCharged()) { mBarsCount++; }

Apparently its not correct.. :-)

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;
  }

  while(!isFullyCharged()) {
    mBarsCount++;
  }

}

1 Answer

hbdc
hbdc
13,725 Points
hbdc
hbdc
13,725 Points

You need to implement your loop inside the charge() method:

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