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Two overloaded methods

The program defines two overloaded methods named overLoadMthd . One requires an incoming parameter of type Test , and the other requires an incoming parameter of type DumIntfc . When called, each of the overloaded methods prints a message indicating the type of itsargument.

Two objects of the class Test

The program instantiates two objects of the class Test . It assigns one of the object's references to a reference variable named a , which is declared to be of type Test .

The program assigns the other object's reference to a reference variable named b , which is declared to be of type DumIntfc . (Remember, both objects were instantiated from the class Test .)

No surprises here

Then it calls the overloaded method named overLoadMthd twice in succession, passing first the reference variable of type Test and then the reference variable of type DumIntfc .

The program output doesn't produce any surprises. When the reference variable of type Test is passed as a parameter, the overloaded method requiring that type of parameter is selected for execution. When the referencevariable of type DumIntfc is passed as a parameter, the overloaded method requiring that type of parameter is selected for execution.

Back to Question 6

Answer 5

C. float 2.14748365E9 float 9.223372E18double 4.2

Explanation 5

Another subtle method selection issue

This program illustrates a subtle issue in the automatic selection of an overloaded method based on assignment compatibility.

This program defines two overloaded methods named square . One requires an incoming parameter of type float , and the other requires an incoming parameter of type double .

When called, each of these methods prints the type of its formal argument along with the value of the incoming parameter as represented by its formalargument type. In other words, the value of the incoming parameter is printed after it has been automatically converted to the formal argument type.

Printout identifies the selected method

This printout makes it possible to determine which version is called for different types of parameters. It also makes it possible to determine the effectof the automatic conversion on the incoming parameter. What we are going to see is that the conversion process can introduce serious accuracy problems.

Call the method three times

The square method is called three times in succession, passing values of type int , long , and double during successive calls.

(Type long is a 64-bit integer type capable of storing integer values that are much larger than can be stored intype int . The use of this type here is important for illustration of data corruption that occurs through automatic typeconversion.)

The third invocation of the square method, passing a double as a parameter, is not particularly interesting. There is a version of square with a matching argument type, and everything behaves as would be expected for this invocation. The interesting behavioroccurs when the int and long values are passed as parameters.

Passing an int parameter

Questions & Answers

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
Do somebody tell me a best nano engineering book for beginners?
s. Reply
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
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
Virgil
is Bucky paper clear?
CYNTHIA
so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
Harper
Do you know which machine is used to that process?
s.
how to fabricate graphene ink ?
SUYASH Reply
for screen printed electrodes ?
SUYASH
What is lattice structure?
s. Reply
of graphene you mean?
Ebrahim
or in general
Ebrahim
in general
s.
Graphene has a hexagonal structure
tahir
On having this app for quite a bit time, Haven't realised there's a chat room in it.
Cied
what is biological synthesis of nanoparticles
Sanket Reply
what's the easiest and fastest way to the synthesize AgNP?
Damian Reply
China
Cied
types of nano material
abeetha Reply
I start with an easy one. carbon nanotubes woven into a long filament like a string
Porter
many many of nanotubes
Porter
what is the k.e before it land
Yasmin
what is the function of carbon nanotubes?
Cesar
I'm interested in nanotube
Uday
what is nanomaterials​ and their applications of sensors.
Ramkumar Reply
what is nano technology
Sravani Reply
what is system testing?
AMJAD
preparation of nanomaterial
Victor Reply
Yes, Nanotechnology has a very fast field of applications and their is always something new to do with it...
Himanshu Reply
good afternoon madam
AMJAD
what is system testing
AMJAD
what is the application of nanotechnology?
Stotaw
In this morden time nanotechnology used in many field . 1-Electronics-manufacturad IC ,RAM,MRAM,solar panel etc 2-Helth and Medical-Nanomedicine,Drug Dilivery for cancer treatment etc 3- Atomobile -MEMS, Coating on car etc. and may other field for details you can check at Google
Azam
anybody can imagine what will be happen after 100 years from now in nano tech world
Prasenjit
after 100 year this will be not nanotechnology maybe this technology name will be change . maybe aftet 100 year . we work on electron lable practically about its properties and behaviour by the different instruments
Azam
name doesn't matter , whatever it will be change... I'm taking about effect on circumstances of the microscopic world
Prasenjit
how hard could it be to apply nanotechnology against viral infections such HIV or Ebola?
Damian
silver nanoparticles could handle the job?
Damian
not now but maybe in future only AgNP maybe any other nanomaterials
Azam
Hello
Uday
I'm interested in Nanotube
Uday
this technology will not going on for the long time , so I'm thinking about femtotechnology 10^-15
Prasenjit
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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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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