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Java Java Objects Harnessing the Power of Objects Computed Properties

chase singhofen
chase singhofen
3,811 Points
Posted by chase singhofen
chase singhofen
3,811 Points

i cant figure out how to make the battery return false if its empty

Create a new public method named isBatteryEmpty that returns true if the battery has 0 bars remaining, and false otherwise. thx

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 isBatteryEmpty == 0;
  if(!barCount.isBatteryEmpty());
  System.out.println("is not empty");


}
}

3 Answers

Sai Nanduru
Sai Nanduru
1,997 Points
Sai Nanduru
Sai Nanduru
1,997 Points

Need to check, whether barCount variable value is 0 or not. If it is 0, then battery is empty and return true. Otherwise, return false.

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

Note: barCount==0, returns either true or false. Making use of terinary Operator (?) in Java to get the return boolean value

Sean Heaslip
Sean Heaslip
4,490 Points
Sean Heaslip
Sean Heaslip
4,490 Points

I feel your pain! I'm learning java basics myself and was stuck on this very same question for a while. I hope the below helps!

The return should appear at the end of your code. This is what the method outputs or 'return'(s).

The 'isBatteryEmpty()' method has a return type ... remember the default return value of boolean (primative) is 'false'. In this instance a boolean returns true if barCount ==0 . The method would return false if the condition is not met.

// default value of primative boolean is'false':

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

apoel fc
apoel fc
344 Points
apoel fc
apoel fc
344 Points

The correct answer i think is this :

public boolean isBatteryEmpty(){ if(barCount == 0){ return true; }else{ System.out.println("Battery is not empty"); } } }

if barCount is equals to 0 then its true battery is empty otherwise barCount is not equal to zero so Battery is not empty