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

Posted by Hank Tran
Hank Tran
652 Points

I don't understand. Help me,please.

thanks

GoKart.java 
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;
  }

  /*Okay, so let throw an IllegalArgumentException form the dirve method if the requested number 
  of laps cannot be completed on the current battery level. 
  Make the exception message "Not enough battery remains".*/
  public void drive() {
    if (  ) {
      throw new IllegalArgumentException("Not enough battery remains.");
    }
  }

  public void drive(int laps) {
    // Other driving code omitted for clarity purposes
    mBarsCount -= laps;
  }

  public void charge() {
    while (!isFullyCharged()) {
      mBarsCount++;
    }
  }

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

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

}

1 Answer

Ollie Prentice
Ollie Prentice
11,685 Points
Ollie Prentice
Ollie Prentice
11,685 Points

Ok you're close.

You need to put your code in the other drive method.

the if statement needs to call the iae if the laps exceed the mBarsCount.

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

    if (laps > mBarsCount) {
      throw new IllegalArgumentException("Not enough battery remains");
    }
        mBarsCount -= laps;
  }
Hank Tran
Hank Tran
652 Points

Thanks Ollie Prentice!