// Lang_21 [method references (static)].nova


// The application class.
class MethodReferencesStaticApp
{
   // Application class's "main" function.
   public static void main( String[] args )
   {
      // Declare a static method reference.
      String (static)( int, int ) methodRef = add;

      // Declare and initialize a generic method reference primitive.
      method m = methodRef;

      // Create a method reference object from the primitive.
      Method obj = new Method( methodRef );

      // Output the method reference object.
      Stream.writeLine( obj.toString( ) );

      // Output the method reference object using the static method.
      Stream.writeLine( Method.toString( methodRef ) );

      // Call the static method reference.
      Stream.writeLine( methodRef( 5, 5 ) );

      // Assign the "subtract" method to the static method reference.
      methodRef = ExampleClass.subtract;

      // Call the static method reference.
      Stream.writeLine( methodRef( 0, 5 ) );

      // Declare a static method reference with a void return type.
      void (static)( String ) methodRefVoid = ExampleClass.message;

      // Call the static method reference with the void return type.
      methodRefVoid( "static method \"message\" called.\n" );
   }


   // Static method to add two Integers and return a String result.
   private static String add( int x, int y )
   {
      Stream.writeLine( "static method \"add\" called." );

      return Integer.toString( x + y );
   }
}


// Example class with a static subtraction method.
class ExampleClass
{
   // Static method to subtract two Integers and return a String result.
   public static String subtract( int x, int y )
   {
      Stream.writeLine( "static method \"subtract\" called." );

      return Integer.toString( x - y );
   }

   public static void message( String message )
   {
      // Output the message.
      Stream.write( message );
   }
}