interface EmployeeSpec{   //  Declares interface implemented by class Employee
   String getName();
   double getWkPay();
}

public class Employee implements EmployeeSpec
/** Class to represent an Employee.  Should really be abstract.   */
{
// fields

   protected String name;      /** name of employee */
   protected Date birthDate;   /** employee's date of birth */

// constructors  -- note that constructors do not have return type!

   public Employee (String emp_name, Date emp_bday){
   /* post: creates Employee object from name and birthdate   */
      name = emp_name;         // initialize fields
      birthDate = emp_bday;
   }

// methods

   public String getName()
   // post: Returns name of Employee
   {  return name;               // return name field }
   
   public int getAge()
   /** post: returns the age of the Employee   */
   {          
      Date today = new Date();   // declares today and set to today's date
            // declare yearDiff and initialize to diff of years
      int yearDiff = (today.getYear() - birthDate.getYear());
      
      if ((today.getMonth() > birthDate.getMonth()) || 
         (today.getMonth() == birthDate.getMonth() && 
                  today.getDay() > birthDate.getDay())){
         return yearDiff;         // already had birthday this year
      } else{                        
         return yearDiff - 1;     // adjust age if not had birthday yet this year
      }
   }
   
   public double getWkPay()   
   /** post: Return weekly pay.  Will be overridden in subclasses.*/
   {  return 0.0;}
   
   /** This is the main program.  */
   public static void main(String args[]){      
      Date kbday = new Date(1948,10,16);                     
      System.out.println("My birthday is "+kbday+".");
      Employee emp = new Employee("Kim Bruce",kbday);
      System.out.println("Today, the employee, "+emp.getName()+", is "+emp.getAge()
            +" years old.");
      System.out.println("He makes $"+emp.getWkPay()+" per week!");
   }

}