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The screen output

Listing 1 shows the instantiation of a new object of class B, immediately following the instantiation of an object of class A.

The object instantiated from the member class named B is linked to the objectinstantiated from the top-level class named A.

The constructors for the classes named A and B produce the two lines of output shown in Figure 3 , the first of which is a repeat of the output shown in Figure 2 .

The method named bShow

The class named B also defines a private method named bShow . As with the method named aShow mentioned earlier, I will defer a discussion of bShow until later when it is called.

The member class named C

Listing 7 shows the beginning of a member class named C.

Class C is a member of the class named B. In other words, the beginning of the definition of the class named C begins before the curly brace thatends the definition of the class named B.

The code in Listing 7 declares several instance variables for the class named C, and initializes two ofthem. The purpose of these variables will become clear later when they are used.

(Note also that class C extends class X, in order to illustrate that the class containment hierarchy is independent of the inheritance hierarchy.)

Constructor for class C

Listing 8 shows the beginning of the constructor for the class named C.

Whenever an object of the class named C is instantiated, the constructor code shown in Listing 8 does the following:

  • Saves the value of an incoming parameter in a private instance variable named cVar .
  • Increments the object counter named objCntC , which is a class variable of the class named A, maintaining a count of objects instantiatedfrom class C.
  • Saves the value of the object counter in an instance variable named objNumber to identify the specific object.
  • Displays a message showing the identification of the object being instantiated.

Screen output

Listing 1 shows the instantiation of a new object of class C, immediately following the instantiation of an object of class B.

The object instantiated from the member class named C is linked to the objectinstantiated from the member class named B. Similarly, the object instantiated from the member class named B is linked to the object instantiated from thetop-level class named A.

The constructors for the classes named A, B, and C produce the three lines of output shown in Figure 4 , the first two of which are repeated from Figures 2 and Figure 3 .

The output shown in Figure 4 demonstrates that the code in Listing 1 causes the constructors for the three classes to be executed in sequence.

At this point, I am going to put the discussion of the class named C on hold and discuss another member class named D.

The private member class named D

Top-level classes cannot be private. However, member classes can be private provided that the using code is consistent with theuse of private members. To demonstrate this, the class named C contains a private member class named D, which is shown in its entirety in Listing 9 .

The most significant thing about the class named D is that it is declared private.

Questions & Answers

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
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
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
research.net
kanaga
sciencedirect big data base
Ernesto
Introduction about quantum dots in nanotechnology
Praveena Reply
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
Bharti
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
Daniel
how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
Maciej
characteristics of micro business
Abigail
for teaching engĺish at school how nano technology help us
Anassong
How can I make nanorobot?
Lily
Do somebody tell me a best nano engineering book for beginners?
s. Reply
there is no specific books for beginners but there is book called principle of nanotechnology
NANO
how can I make nanorobot?
Lily
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
s.
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
Tarell
what is the actual application of fullerenes nowadays?
Damian
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
Tarell
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Source:  OpenStax, Object-oriented programming (oop) with java. OpenStax CNX. Jun 29, 2016 Download for free at https://legacy.cnx.org/content/col11441/1.201
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