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Java Java Objects Harnessing the Power of Objects Changing State

Posted by Seemant Shekhar
Seemant Shekhar
228 Points

how to solve this

i made a method which is void and public but its not working

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 static void charge(barCount){
    barcount = MAX_BARS;
  }
}

1 Answer

Joseph Wasden
Joseph Wasden
20,406 Points
Joseph Wasden
Joseph Wasden
20,406 Points

You are close. However, you don't need to declare the charge() method to static. (Static means you can access the method without an instance of GoKart, which we wouldn't need to set the charge of a GoKart until it is instantiated) and you don't need to pass in barCount as an argument of the charge method; just change it directly in the method. I've added the this keyword in the charge method so that we are charging that instance of GoKart's barCount.

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(){ // no need to pass in barCount, so removed from the argument list
    this.barCount = MAX_BARS; //use the "this" keyword to set the given instantiation of GoKart's barcount value to MAX_BARS
  }
}
Seemant Shekhar
Seemant Shekhar
228 Points

Thnx for helping...