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Java Java Objects Harnessing the Power of Objects Throwing Exceptions

Posted by Shrish Singh
Shrish Singh
1,193 Points

not able to understand how it works

please help

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) {
    int newAmount = lapsDriven + laps;
    if(newAmount>MAX_BARS){
      throw new IllegalArgumentException("not");

    }

    lapsDriven = newAmount;


  }
}

1 Answer

Malcom T.L Musuma
Malcom T.L Musuma
11,363 Points
Malcom T.L Musuma
Malcom T.L Musuma
11,363 Points

Hello mate!

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) {
    if(laps>barCount){
      throw new IllegalArgumentException();
    }
    lapsDriven += laps;
    barCount -= laps;
  }
}

Check if there aren't enough bars to support the laps request, there will be more laps than the barCount. Hence throw the exception at that condition