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Java Java Objects Harnessing the Power of Objects Computed Properties

Steve Wofford
Steve Wofford
2,485 Points
Posted by Steve Wofford
Steve Wofford
2,485 Points

Cant get value to become true.

Why wont the method work?

GoKart.java 
class GoKart {
  public static final int MAX_BARS = 8;
  private String color;
  private int barCount;

  public GoKart(String color) {
    this.color = color;
  }

  public String getColor() {
    return color;
  }

  public void charge() {
    barCount = MAX_BARS;
  }

  public boolean isBatteryEmpty() {
    return barCount == 0;
}

3 Answers

Ivan Bagaric
Ivan Bagaric
Courses Plus Student 12,356 Points

Oh i spell wrong function name isFullyCharge should be isFullyCharged

anyway, here is final code, and this works for me on challenge

class GoKart {
  public static final int MAX_BARS = 8;
  private String color;
  private int barCount;

  public GoKart(String color) {
    this.color = color;
  }

  public String getColor() {
    return color;
  }

  public void charge() {
    barCount = MAX_BARS;
  }

  public boolean isBatteryEmpty() {
    return (barCount == 0) ? true : false;
  }

  public boolean isFullyCharged() {
    return (barCount == MAX_BARS) ? true : false;
  }
}
Steve Wofford
Steve Wofford
2,485 Points
Steve Wofford
Steve Wofford
2,485 Points

thanks so much Ivan. I appreciate the help!

Paul Lave
Paul Lave
2,714 Points
Paul Lave
Paul Lave
2,714 Points

All that is being returned is a barCount == 0. This doesn't give an option for true or false, just that it equals 0. The following setup will return true if the bar count equals 0 or false if it does not.

public boolean isBatteryEmpty() { if(barCount == 0) { return true; } else { return false; } }

Hope that helps!

Ivan Bagaric
PLUS
Ivan Bagaric
Courses Plus Student 12,356 Points
Ivan Bagaric
Ivan Bagaric
Courses Plus Student 12,356 Points

you can do it like this:

public boolean isBatteryEmpty() {
  if (barCount == 0) {
     return true;
  } else {
     return false;
  }
}

or shortly

public boolean isBatteryEmpty() {
    return (barCount == 0) ? true : false;
}

Second part of challenge

public boolean isFullyCharge() {
    if (barCount == MAX_BARS) {
             return true; 
        } else {
             return false;
        }
}

or

public boolean isFullyCharge() {
    return (barCount == MAX_BARS) ? true : false;
}
Steve Wofford
Steve Wofford
2,485 Points
Steve Wofford
Steve Wofford
2,485 Points

I've tried both the short way and the long way. I've even tried copy/paste. Still wont run the code.