// Fig. 10.1: PolymorphismTest.java
// Assigning superclass and subclass references to superclass and
// subclass variables.

public class PolymorphismTest  
{
   public static void main( String[] args ) 
   {
      // assign superclass reference to superclass variable
      CommissionEmployee commissionEmployee = new CommissionEmployee( 
         "Sue", "Jones", "222-22-2222", 10000, .06 );                    

      // assign subclass reference to subclass variable
      BasePlusCommissionEmployee basePlusCommissionEmployee = 
         new BasePlusCommissionEmployee( 
         "Bob", "Lewis", "333-33-3333", 5000, .04, 300 );         

      // invoke toString on superclass object using superclass variable
      System.out.printf( "%s %s:\n\n%s\n\n", 
         "Call CommissionEmployee's toString with superclass reference ",
         "to superclass object", commissionEmployee.toString() );

      // invoke toString on subclass object using subclass variable      
      System.out.printf( "%s %s:\n\n%s\n\n", 
         "Call BasePlusCommissionEmployee's toString with subclass",
         "reference to subclass object", 
         basePlusCommissionEmployee.toString() );

      // invoke toString on subclass object using superclass variable
      CommissionEmployee commissionEmployee2 = 
         basePlusCommissionEmployee; 
      System.out.printf( "%s %s:\n\n%s\n", 
         "Call BasePlusCommissionEmployee's toString with superclass",
         "reference to subclass object", commissionEmployee2.toString() );
   } // end main
} // end class PolymorphismTest

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