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Java Java Objects (Retired) Harnessing the Power of Objects Helper Methods

Posted by James Pask
James Pask
13,600 Points

Creating the helper method to determine if the battery is fully charged.

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

I think I'm getting confused with the 'not' operator. The max capacity is declared when MAX_BARS == 8 so I want the boolean method to return true when this is the case but I'm under the impression that we should be using the 'not' operator here. If the value is NOT 8 then it's not full so shouldn't return the true value.

Not sure how to write the "If" statement - can someone help?

GoKart.java 
public class GoKart {
  public static final int MAX_BARS = 8;
  private String mColor;
  private int mBarsCount;

  public GoKart(String color) {
    mColor = color;
    mBarsCount = 0;
  }

  public String getColor() {
    return mColor;
  }

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

  public boolean isFullyCharged() {
   if (!mBarsCount==0);
  }

  public void charge() {
    mBarsCount = MAX_BARS;
  }
}

3 Answers

Sivasuryateja Raparla
Sivasuryateja Raparla
3,966 Points
Sivasuryateja Raparla
Sivasuryateja Raparla
3,966 Points

no need of ! or if statement. You have to check whether the battery is fully charged. It will be fully charged if the bars equal to 8. if not the battery is not fully charged.

MUZ141027 Tapiwa Choga
MUZ141027 Tapiwa Choga
4,751 Points
MUZ141027 Tapiwa Choga
MUZ141027 Tapiwa Choga
4,751 Points

last part public boolean isFullyCharged() { if (!mBarsCount==8);

it should be 8 not o

rodolfotavares
rodolfotavares
4,820 Points
rodolfotavares
rodolfotavares
4,820 Points

needs to be a conditional with if and else.

public boolean isFullyCharged(){ if (mBarsCount != MAX_BARS){ return false; }else{ return true; }

} i think it is.