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For example, you might incorporate a Cockpit object, a LandingGear object, a Propeller object, etc. Then, (even though it wouldn't be good grammar), you could say than an object ofyour Airplane class "has a" Cockpit object, "has a" LandingGear object, etc. This is often referred to as a HASA relationship. For example, an airplane ISA airship andHASA cockpit.

Preview

The airship hierarchy

A little earlier I explained an airship hierarchy involving an Airship class, a Balloon class, and an Airplane class. I will present and explain a sample program that implements that hierarchy. The output from the program is shown in Figure 1 . I will refer back to Figure 1 in the paragraphs that follow.

Figure 1 . Output from the program named Airship01.

Balloon range = 5 milesaltitude = 500 feet passenger capacity = 5lift media = Hot Air Airplanerange = 5000 miles altitude = 35000 feetcargo capacity = 20000 pounds engine type = jet

Discussion and sample code

Will explain in fragments

I will explain this program in fragments. A complete listing of the program is provided in Listing 4 near the end of the module.

Four class definitions

This program consists of four class definitions:

  • Airship
  • Balloon
  • Airplane
  • Driver

The Airship class defines properties that are common to machines that fly:

  • Range
  • Altitude

The Balloon class extends the Airship class and defines properties that are peculiar to airships that are lighter than air:

  • Passenger capacity
  • Lift Media (hot air, helium, or hydrogen)

The Airplane class extends the Airship class and defines properties that are peculiar to airplanes:

  • Cargo capacity
  • Engine type

The Driver class instantiates objects of the Balloon class and the Airplane class and exercises their set and get methods.

The Airship class

Listing 1 shows the Airship class in its entirety.

Listing 1 . The Airship class.

//Define common properties in the base class. class Airship {private int rangeData = 0; private int altitudeData = 0;public int range { get {return rangeData; }//end getset { rangeData = value;}//end set }//end range propertypublic int altitude { get {return altitudeData; }//end getset { altitudeData = value;}//end set }//end altitude property}//end class Airship

There is nothing in Listing 1 that you haven't seen in earlier modules. This class provides set and get methods for two properties named range and altitude .

The Balloon class

Listing 2 shows the Balloon class in its entirety.

Listing 2 . The Balloon class.

//Define unique properties in the subclass. class Balloon : Airship {private int passengerCapacityData; private String liftMediaData;public int passengerCapacity { get {return passengerCapacityData; }//end getset { passengerCapacityData = value;}//end set }//end passengerCapacity propertypublic String liftMedia { get {return liftMediaData; }//end getset { liftMediaData = value;}//end set }//end liftMedia property}//end Balloon class

The new material

The only thing in Listing 2 that is new to this module is the colon that appears between the words Balloon and Airship on the second line. This is the C# way of specifying that the class named Balloon extends or inherits from the class named Airship . In this case, the Balloon class is the subclass or derived class and the Airship class is the superclass or base class, depending on which flavor of jargon you prefer.

Questions & Answers

where we get a research paper on Nano chemistry....?
Maira Reply
what are the products of Nano chemistry?
Maira Reply
There are lots of products of nano chemistry... Like nano coatings.....carbon fiber.. And lots of others..
learn
Even nanotechnology is pretty much all about chemistry... Its the chemistry on quantum or atomic level
learn
Google
da
no nanotechnology is also a part of physics and maths it requires angle formulas and some pressure regarding concepts
Bhagvanji
Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
revolt
da
Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
Jyoti Reply
I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
Damian
yes that's correct
Professor
I think
Professor
Nasa has use it in the 60's, copper as water purification in the moon travel.
Alexandre
nanocopper obvius
Alexandre
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
Rafiq
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
Damian
How we are making nano material?
LITNING Reply
what is a peer
LITNING Reply
What is meant by 'nano scale'?
LITNING Reply
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
how nano science is used for hydrophobicity
Santosh
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
Rafiq
what is differents between GO and RGO?
Mahi
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
Rafiq
if virus is killing to make ARTIFICIAL DNA OF GRAPHENE FOR KILLED THE VIRUS .THIS IS OUR ASSUMPTION
Anam
analytical skills graphene is prepared to kill any type viruses .
Anam
Any one who tell me about Preparation and application of Nanomaterial for drug Delivery
Hafiz
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
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Source:  OpenStax, Xna game studio. OpenStax CNX. Feb 28, 2014 Download for free at https://legacy.cnx.org/content/col11634/1.6
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