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Java Java Objects Harnessing the Power of Objects Overload Methods

Enyang Mercy
PLUS
Enyang Mercy
Courses Plus Student 2,339 Points
Posted by Enyang Mercy
Enyang Mercy
Courses Plus Student 2,339 Points

method overloading bring back old method

creat new method that accepts no argument it should call the new method

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

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

  public String getColor() {
    return color;
  }
  public void charge() {
    barCount = MAX_BARS;
  }

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

  public boolean isFullyCharged() {
    return MAX_BARS == barCount;
  }

  public void drive(int lapsDriven) {
    lapsDriven++;
    barCount-= barCount;
    lapsDriven += lapsDriven;
  }

  public void drive() {
    lapsDriven+= lapsDriven;
  }

  }
}

2 Answers

Yanuar Prakoso
Yanuar Prakoso
15,196 Points
Yanuar Prakoso
Yanuar Prakoso
15,196 Points

Hi There... All you need to do is call the drive method with int parameter from the new drive method with no parameter, which as you know this is what they called as method overloading in practice. This is how you should modify the last part of the code:

public void drive(int laps) {
    lapsDriven += laps;
    barCount -= laps;
  }

  public void drive(){
    drive(1);
  }

As you can see the later drive() method called the previous drive(int laps) method and pass an integer 1 as the parameter to make the drive(int laps) to behave as the old drive method which add the lapsDriven variable by one and substract the barCount variable by one. The whole code should be like this:

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

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

  public String getColor() {
    return color;
  }
  public void charge() {
    barCount = MAX_BARS;
  }

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

  public boolean isFullyCharged() {
    return MAX_BARS == barCount;
  }

  public void drive(int laps) {
    lapsDriven += laps;
    barCount -= laps;
  }

  public void drive(){
    drive(1);
  }
}

I hope this can help you solve the problem.