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

Posted by kevinshen3
kevinshen3
681 Points

There is a Compile error in my IllegalArgumentExeption. Can someone help?

I Throwed the IllegalArgumentExeption in the right way as it is given in the video and is showed on the internet by doing: Throw new IllegalArgumentExeption("Not Enough Battery Remains.");. The Compiler shows me an error where the Uppercase in the i is the problem. Can someone show me how to do it correctly?

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;
  }

  public void drive() {
    drive(1);
  }

  public void drive(int laps) {
    // Other driving code omitted for clarity purposes
    int newLaps = mBarsCount -= laps;
    if(newLaps > MAX_BARS){
       throw new IllegalArgumentExeption("Not Enough Battery Remains.");
    }
    laps = newLaps;
  }

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

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

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

}

1 Answer

Michael Norman
PLUS
Michael Norman
Courses Plus Student 9,399 Points
Michael Norman
Michael Norman
Courses Plus Student 9,399 Points

Your main issue is not really the exception you are throwing but the drive method itself. Lets take a look at the original drive method

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

What's happening is we pass the method the number of laps we want to drive and it subtracts those laps from the tota number of bars we have in our batter, mBarsCount. The challenge wants us to throw the new exception if the number of laps we want to drive cannot be completed on our current battery. Also the string inside your exceptions is not exactly the way the challenge wants it and treehouse is pretty strict on those. The updated drive method should look like this:.

public void drive(int laps) {
    // Other driving code omitted for clarity purposes
    if (laps > mBarsCount) {
        throw new IllegalArgumentException("Not enough battery remains");
    }
    mBarsCount -= laps;
  }