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 Matt Bloomer
Matt Bloomer
10,608 Points

incrementing

I am uncertain about how to tackle this problem. It seems that the use of the while loop was employed in the other file-the example.java. How exactly should one increment this until it is charged.

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() {
    while (!isBatteryEmpty()){
      mBarsCount==MAX_ENERGY_BARS;
    }
    return mBarsCount == MAX_ENERGY_BARS;
  }

}

1 Answer

Ollie Prentice
Ollie Prentice
11,685 Points
Ollie Prentice
Ollie Prentice
11,685 Points

So if the battery is not fully charged the mBarsCount need to increment. You need to add the code to the charge method.

not symbol = ! used with the isFullyCharged method will solve this problem.

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