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Java Java Objects (Retired) Harnessing the Power of Objects Throwing Exceptions

java exceptions challenge

I can't get to work on this problem. It says that I'm not stating if sentence correctly. Please anyone help.

public class GoKart {
  public static final int MAX_BARS = 8;
  private String mColor;
  private int mBarsCount;

  public GoKart(String color) {
    mColor = color;
    mBarsCount = 0;

  public String getColor() {
    return mColor;

  public void drive() {

  public void drive(int laps) {
    // Other driving code omitted for clarity purposes

    if(laps < 0){
      mBarsCount -= laps;
      }catch(IllegalArgumentException iae){
        System.out.printf("Not enough battery remains");

  public void charge() {
    while (!isFullyCharged()) {

  public boolean isBatteryEmpty() {
    return mBarsCount == 0;

  public boolean isFullyCharged() {
    return mBarsCount == MAX_BARS;


1 Answer

Rob Bridges
.a{fill-rule:evenodd;}techdegree seal-36
Rob Bridges
Full Stack JavaScript Techdegree Graduate 35,467 Points

Hello, it looks like you were getting a head of yourself, you don't need to catch anything in this step. Just throwing a new exception, however if your if block you actually want the > "greater than symbol" to check and see if laps is greater than mBarsCount.

Hope this helps.

if (laps > mBarsCount) {

throw new IllegalArgumentException("Not enough battery remains");

mBarsCount -= laps;

Solved! Thank you. I totally forgot about throwing exceptions.