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Java Java Objects Harnessing the Power of Objects Increment and Decrement

Oquendo Lewis
Oquendo Lewis
522 Points

I keep getting the "You have not passed task 1 error" when I haven't changed task 1's passing element

Im not particularly sure if this error is my fault or a system bug but I've been stuck here for half a day trying to figure out what I am doing wrong

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() {
    return lapsDriven+=;

1 Answer

It says that because of the way those automated tests work. Your class no longer compiles, so none of the tests pass, including for task 1.

Two small mistakes that make the compiler complain:

  • You're returning an int, so the return type of your method should be int, not void
  • The '+=' operator is for when you're adding something else than 1, and you need to specify what you're adding to the variable. For example 'lapsDriven += 3;' To increment by one, the correct operator is '++'
Oquendo Lewis
Oquendo Lewis
522 Points

Thanks for your response I was able to use the pointers you gave me to find the solution :)