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Java Java Objects Harnessing the Power of Objects Throwing Exceptions

Posted by Miguel Silva
Miguel Silva
7,757 Points

I have no idea what to do to solve this challenge. PLease help.

I don't know what I'm doing wrong.

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() {
    drive(1);
  }

  public void drive(int laps) {
    lapsDriven += 8;
    barCount -= 8;
    int newlaps = lapsDriven + barCount;
    if ( newlaps < MAX_BARS) {
      throw new IllegalArgumentException ("Too many laps");
  }}
}

1 Answer

markmneimneh
markmneimneh
14,132 Points
markmneimneh
markmneimneh
14,132 Points

Hello

It has been a while since I took this challenge, but I see a problem here:

public void drive(int laps) {
    lapsDriven += 8;
    barCount -= 8;
    int newlaps = lapsDriven + barCount;
    if ( newlaps < MAX_BARS) {
      throw new IllegalArgumentException ("Too many laps");
  }}

I suspect this should be like this:

public void drive(int laps) {
    lapsDriven += laps;
    barCount -= laps;
    if ( barCount <= 0) {
      throw new IllegalArgumentException ("Too many laps");
  }}

I typed this without testing, but it should point you into the right direction.

If this answers your question, please mark question as annswered.

Miguel Silva
Miguel Silva
7,757 Points

I figured it out thank you

Alex Bratkovskij
Alex Bratkovskij
5,329 Points
Alex Bratkovskij
Alex Bratkovskij
5,329 Points

or just change the comparison to opposite. since we dispose 1 bar per lap it still will work.

public void drive(int laps) {
    lapsDriven += 8;
    barCount -= 8;
    int newlaps = lapsDriven + barCount;
    if ( newlaps > MAX_BARS) { // here
      throw new IllegalArgumentException ("Too many laps");
  }}