// Fig. 9.21: Test.java
// Driver for Employee hierarchy

// Java core packages
import java.text.DecimalFormat;

// Java extension packages
import javax.swing.JOptionPane;

public class Test {

   // test Employee hierarchy
   public static void main( String args[] )
   {
      Employee employee;  // superclass reference
      String output = "";

      Boss boss = new Boss( "John", "Smith", 800.0 );

      CommissionWorker commissionWorker =
         new CommissionWorker( 
            "Sue", "Jones", 400.0, 3.0, 150 );

      PieceWorker pieceWorker =
         new PieceWorker( "Bob", "Lewis", 2.5, 200 );

      HourlyWorker hourlyWorker =
         new HourlyWorker( "Karen", "Price", 13.75, 40 );

      DecimalFormat precision2 = new DecimalFormat( "0.00" );

      // Employee reference to a Boss 
      employee = boss;  

      output += employee.toString() + " earned $" +
         precision2.format( employee.earnings() ) + "\n" +
         boss.toString() + " earned $" +
         precision2.format( boss.earnings() ) + "\n";

      // Employee reference to a CommissionWorker
      employee = commissionWorker;

      output += employee.toString() + " earned $" +
         precision2.format( employee.earnings() ) + "\n" +
         commissionWorker.toString() + " earned $" +
         precision2.format( 
            commissionWorker.earnings() ) + "\n";

      // Employee reference to a PieceWorker
      employee = pieceWorker;
  
      output += employee.toString() + " earned $" +
         precision2.format( employee.earnings() ) + "\n" +
         pieceWorker.toString() + " earned $" +
         precision2.format( pieceWorker.earnings() ) + "\n";
   
      // Employee reference to an HourlyWorker
      employee = hourlyWorker;  

      output += employee.toString() + " earned $" +
         precision2.format( employee.earnings() ) + "\n" +
         hourlyWorker.toString() + " earned $" +
         precision2.format( hourlyWorker.earnings() ) + "\n";

      JOptionPane.showMessageDialog( null, output,
         "Demonstrating Polymorphism",
         JOptionPane.INFORMATION_MESSAGE );

      System.exit( 0 );
   }

}  // end class Test

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 * (C) Copyright 2002 by Deitel & Associates, Inc. and Prentice Hall.     *
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