/*
 *  ==============================================================================
 *  DemoTryPolymorphism.java: Polymorphism is the capability of an action
 *  or method to do different things based on the details of object that it is
 *  acting upon. This is the third basic principle of object oriented programming. 
 *  
 *  Java can support various forms of polymorphism. The simplest form is
 *  overloaded methods. That is, methods with the same name signature but either
 *  a different number of parameters or different types in the parameter list. 
 *
 *  Written By: Mark Austin                                           October 2005
 *  ==============================================================================
 */

public class DemoPolymorphism {

   // Version 1: Method doSomething() has no args ...

   public static void doSomething() {
      System.out.println("*** In doSomething()         ");
      System.out.println("    Version has no args!! ");
   }

   // Version 2: Method doSomething() has one arg of type float!

   public static void doSomething( float fX ) {
      System.out.println("*** In doSomething()         ");
      System.out.println("    Version has one argument of type float!");
   }

   // Version 3: Method doSomething() has one arg of type double!

   public static void doSomething( double dX ) {
      System.out.println("*** In doSomething()         ");
      System.out.println("    Version has one argument of type double!");
   }

   // ---------------------------------------------------------
   // main method : this is where the program execution begins.
   // ---------------------------------------------------------

   public static void main ( String [] args ) {
       float  fX = 1.0f;
       double dY = 1.0;

       // Call doSomething() methods in a variety of ways ....

       System.out.println("*** In main(): call doSomething() for the first time" );
       doSomething();
       System.out.println("*** In main(): call doSomething() again" );
       doSomething( dY );
   }
}