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

Ronit Mankad
Ronit Mankad
12,166 Points
Posted by Ronit Mankad
Ronit Mankad
12,166 Points

Compiler Error...plz Help

Can anyone explain me my logical error? Thanks in advance

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(!GoKart.isFullyCharged()){
    mBarsCount++;
  }

}

1 Answer

jcorum
jcorum
71,830 Points

Almost! But the while needs to be inside the charge() method:

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

The way you have it the compiler thinks you are trying to write a method -- which cannot start with while.

Also, when you call non-static methods you don't use a class name to call them. And in the same class, you don't have any prefix at all.

Ronit Mankad
Ronit Mankad
12,166 Points
Ronit Mankad
Ronit Mankad
12,166 Points

Thanks...problem solved!