class Person
{
  String name ;
  int age ;
  Person()
   {
	   System.out.println( "Person()" ) ;
   }
  Person( String nameP , int ageP )
   {
	   name = nameP ;
	   age = ageP ;
	   System.out.println( "Person() with arguments" ) ;
   }

   void print()
    {
		System.out.println("name: " + name +
		    " age: " + age ) ;
	}

}

class Employee extends Person
{
  String jobTitle ;
  String DeptName ;
  String ssn ;
  Employee( String nameP, int ageP,
    String jobTitleP, String DeptNameP, String ssnP )
   {

	   //super()
	   //If we don't supply super then the default super
	   // ( without any args constructor ) if
 	   // it exists will be called for us
	   //jobTitleP, DeptNameP, ssnP

	   super( nameP , ageP ) ;
	   jobTitle = jobTitleP ;
	   DeptName = DeptNameP ;
	   ssn = ssnP ;
	   System.out.println( "Employee with arguments()" ) ;

   }

   //Good idea. Compile time checking .
   //if base class does not have this method we
   //get an error
   @Override
   void print()
    {
		//Calling a base class method from derived class
		//if it has the same method name
		 super.print() ;
		 System.out.println("Job Title: " + jobTitle +
				    " Dept: " + DeptName + " ssn:" + ssn ) ;

	}
}



public class Upcasting
{
   public static void main( String args[] )
   {

     Employee employeeObject1 = new Employee("Joe Bugner", 35 ,
       "Programmer", "Engineering" , "119701024" ) ;
     employeeObject1.print() ;

     //Allowed since an employee is a Person conceptually
     Person personObject = employeeObject1  ;
     //ok to call base class functions
     personObject.print() ;

     //Downcasting is not allowed
     // A person may be a student not an employee
     //employeeObject1 = personObject ;

     //Allowed. If it fails while running we get a run time error
     employeeObject1 = (Employee)personObject ;


   } //public static void main( String args[] )


}