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Java Java Objects Harnessing the Power of Objects Increment and Decrement

Posted by Petros Ballas
Petros Ballas
926 Points

HELP "In your newly created drive method, increment the new lapsDriven variable by 1."

""Great! Now let's write a simple drive method. It should be public and not return anything. We'll start out basic, calling the drive method will make the GoKart drive a single lap.

In your newly created drive method, increment the new lapsDriven variable by 1. Use the incrementing shorthand to increase lapsDriven.""

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


  public drive; {
  lapsDriven =+ 1;
  }

  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;
  }


}

7 Answers

Samuel Ferree
Samuel Ferree
31,722 Points

You want to use "lapsDriven += 1;" or "lapsDriven++;"

Either of those will add one to the variable lapsDriven

Petros Ballas
Petros Ballas
926 Points

Thank you, but I feel a bit stupid now...

Petros Ballas
Petros Ballas
926 Points
Petros Ballas
Petros Ballas
926 Points

Hey Jimmy, this is the answer for task 2:

public void drive(){ lapsDriven++; }

Adnan Kashem
Adnan Kashem
2,504 Points

This is Answer :

public void drive(){ lapsDriven ++;

Bryan Castillo
Bryan Castillo
2,484 Points

I had public void drive() { lapsDriven+=;) } Could you explain to me why that wasnt right ? ive been trying this exercise for a week now lol.

Felix Timothy
Felix Timothy
3,064 Points
Felix Timothy
Felix Timothy
3,064 Points

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

public void drive(){ 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; }

Samuel Ferree
Samuel Ferree
31,722 Points
Samuel Ferree
Samuel Ferree
31,722 Points

Your method definition isn't valid.

See how the other methods have a return type specified (i.e. String, void, boolean) and a parameter list [i.e. "(String color)" or empty "()"]

Since your method returns no data, and accepts no parameters, try defining it with a void return type, and empty parameter list "()".

Also, you don't need a semicolon at the end of your method definition, just go straight into a open curly bracket ({)

Petros Ballas
Petros Ballas
926 Points

I done this: public void drive(){ lapsDriven =+; }

and it said this: Oops! It looks like Task 1 is no longer passing. Get Help

Petros Ballas
Petros Ballas
926 Points
Petros Ballas
Petros Ballas
926 Points

I done this: public void drive(){ lapsDriven =+; }

and it said this: Oops! It looks like Task 1 is no longer passing. Get Help

Jimmy Hoang
Jimmy Hoang
476 Points

Hi, just curious did you ever figure this out? I cannot figure out this problem either and I have something similar to you except for the void.

James Birch
James Birch
1,069 Points
James Birch
James Birch
1,069 Points

This worked for me: } public void drive(){ lapsDriven++; }

Dmitry Krutov
PLUS
Dmitry Krutov
Courses Plus Student 759 Points
Dmitry Krutov
Dmitry Krutov
Courses Plus Student 759 Points

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; lapsDriven = 0; }

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() { lapsDriven++; } }