public abstract class HourlyWageEmployee extends Employee
{
   //Instance Variable
   private TimeCard card;
   
   public HourlyWageEmployee(double rate)
   {
      super(rate < MINIMUM_WAGE ? MINIMUM_WAGE : rate);
      this.card = new TimeCard();
   }
   
   public HourlyWageEmployee()
   {
      this(Employee.MINIMUM_WAGE);
   }
   
   public double[] getHours()
   {
      return this.card.getHours();
   }
   
   public void recordHours(TimeCard.WorkDay day, double hours)
   {
      this.card.addHours(day, hours);
   }
   
   protected double totalHours()
   {
      double total = 0.0;
      for (double hours : this.getHours())
         total += hours;
      return total;
   }
   
   public abstract double overtimeHours();
   
   public double grossPay()
   {
      return (this.totalHours() + this.overtimeHours() * 0.5) 
             * this.getPayRate();
   }
   
   public String toString()
   {
      return super.toString() + "/Hour  " + this.card;
   }
}