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Java Java Objects Harnessing the Power of Objects Handling Exceptions

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Example.java
class Example {

  public static void main(String[] args) {
    GoKart kart = new GoKart("purple");
    if (kart.isBatteryEmpty()) {
      System.out.println("The battery is empty");
    }
    try{
      kart.drive(42);
      System.out.println("You are low on battery for this");
    } catch (IllegalArgumentException iae){
      System.out.println("the error was %s",iae.getMessage());
    }

  }

}
GoKart.java
class GoKart {
  public static final int MAX_BARS = 8;
  private int barCount;
  private String color;
  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("Not enough battery remains");
    }
    lapsDriven += laps;
    barCount -= laps;
  }

}

2 Answers

Tabatha Trahan
Tabatha Trahan
21,410 Points

Try using printf in your catch block rather than println. The printf will let you do the string formatting, otherwise if you want to use println, you could just use string concantenation with a +.

Thanks alot. Worked like a charm