<< Chapter < Page Chapter >> Page >

Answer 26

Question 27

True or False? The class that begins in Listing 5 does not have an access modifier. This puts it in package-private access category. A class with package-private access can be accessed by codethat is stored in the same package and cannot be accessed by code stored in other packages.

Answer 27

Question 28

True or False? The last three statements in Listing 5 declare three private variables. Because these variables are declared private, they can be accessed by any method defined in any class in thesame package.

Answer 28

Question 29

True or False? The three variables declared in Listing 5 are instance variables as opposed to class variables .

Answer 29

Question 30

True or False? Because the three variables declared in Listing 5 are instance variables, they belong to an object instantiated from the class. Even if the variables were public, they could onlybe accessed by first gaining access to the object to which they belong.

Answer 30

Question 31

True or False? The three variables declared in Listing 5 are reference variables . This means that they are capable of storing references to objects and are also capable of storing values of the eightprimitive types.

Answer 31

Question 32

True or False? Ericson's class library contains a class named World and another class named Turtle . The code in Listing 5 instantiates one object of the World class and populates that world with three objects of the Turtle class.

Answer 32

Question 33

True or False? Every class definition has one or more method-like members called constructors. (If you don't define a constructor when you define a class, a default constructor will be automatically defined for your class.)

Answer 33

Question 34

True or False? The name of the constructor must always be the same as the name of the class in which it is defined. Like a method, a constructor may ormay not take arguments. If there are two or more (overloaded) constructors, they must have different argument lists.

Answer 34

Question 35

True or False? To instantiate an object of a class, you apply the new operator to the class' constructor, passing parameters that satisfy the requiredarguments for the constructor.

Answer 35

Question 36

True or False? When an object is instantiated, the constructor returns an array containing the values in all of the instance variables.

Answer 36

Question 37

True or False? The last two statements in Listing 5 instantiate two objects of the Turtle class and use them to populate the World object whose reference is stored in the variable named mars .

Answer 37

Question 38

True or False? If a variable (exclusive of local variables inside of methods) is not purposely initialized when the object in instantiated, it will receive a default initialization value. The default values are:

  • 0 or 0.0 for numeric variables
  • true for boolean variables
  • null for reference variables

Answer 38

Question 39

True or False? Code written into a class' constructor is executed when an object of the class is instantiated.

Answer 39

Question 40

True or False? Good object-oriented programming practice says that most of the instance variables encapsulated in an object should be declared private. Ifthere is a need to make the contents of those variables available outside the object, that should be accomplished by defining protected accessor methods.

Questions & Answers

where we get a research paper on Nano chemistry....?
Maira Reply
nanopartical of organic/inorganic / physical chemistry , pdf / thesis / review
Ali
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
hey
Giriraj
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
ya I also want to know the raman spectra
Bhagvanji
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
Got questions? Join the online conversation and get instant answers!
Jobilize.com Reply

Get the best Algebra and trigonometry course in your pocket!





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
Google Play and the Google Play logo are trademarks of Google Inc.

Notification Switch

Would you like to follow the 'Object-oriented programming (oop) with java' conversation and receive update notifications?

Ask