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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

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
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
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
hi
Loga
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
Bharti
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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