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Answer 18

What is the meaning of the following two images?

This image was inserted here simply to insert some space between the questions and the answers to keep them from being visible on the screen at thesame time.

The image is also an example of the kinds of things that we do in my course titled ITSE 2321, Object-Oriented Programming.

Missing image

This image was also inserted for the purpose of inserting space between the questions and the answers.

Missing image


Answer 18

Every instance of a class has its own set of instance variables. You can only access instance variables and instance methods through an object of the class. In this case, forty bytes of memory would be required to containthe instance variables of the ten objects.

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Answer 17

Only one, because out is a class variable of the System class.

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Answer 16

The runtime system allocates a class variable only once no matter how many instances of the class are instantiated. Thus, all objects of the classshare the same physical memory space for the class variable, and in this case, only four bytes of memory will be allocated to contain the allocated variables.

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Answer 15

The statement in Answer 14 calls the println method belonging to an object of the PrintStream class, which is referenced (pointed to) by the out variable, which is a class variable of the System class.

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Answer 14

System.out.println("Dick Baldwin");

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Answer 13

The println method can be accessed by joining the name of a variable that references a PrintStream object to the name of the println method using a period.

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Answer 12

The println method causes its argument to be displayed on the standard output device. (The standard output device is the screen by default, but can be redirected by the user at the operating system level.)

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Answer 11

The println method is an instance method of the PrintStream class.

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Answer 10

The out variable in the System class refers to an instance of the PrintStream class (a PrintStream object), which is automatically instantiated when the System class is loaded into the application.

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Answer 9


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Answer 8

The code fragment accesses the contents of the class variable named out in the class named System .

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Answer 7

False. the variable named out defined in the System class is a reference variable that points to an object of another type.

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Answer 6

False. A class variable can be a primitive type, or it can be a reference variable that points to another object.

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Answer 5


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Answer 4

False. The System class has several class variables (including out and in ) that are useful without the requirement to instantiate an object of the System class.

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Answer 3

False. While it is probably true that the main method must instantiate objects of other classes in order to accomplish much that is of value, this isnot a requirement. The main method in the "Hello World" program of this module does not instantiate objects of any class at all.

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Answer 2

False. The main method can access the variables and methods of objects instantiated from other classes. Otherwise, the flow of the program would bestuck within the main method itself and wouldn't be very useful.

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Answer 1


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This section contains a variety of miscellaneous information.

Housekeeping material
  • Module name: Jb0190r: Review: Using the System and PrintStream Classes
  • File: Jb0190r.htm
  • Published: 11/22/12

Financial : Although the Connexions site makes it possible for you to download aPDF file for this module at no charge, and also makes it possible for you to purchase a pre-printed version of the PDF file, youshould be aware that some of the HTML elements in this module may not translate well into PDF.

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In the past, unknown individuals have copied my modules from cnx.org, converted them to Kindle books, and placed them for sale onAmazon.com showing me as the author. I neither receive compensation for those sales nor do I know who does receive compensation. If youpurchase such a book, please be aware that it is a copy of a module that is freely available on cnx.org and that it was made andpublished without my prior knowledge.

Affiliation : I am a professor of Computer Information Technology at Austin Community College in Austin, TX.


Questions & Answers

how can chip be made from sand
Eke Reply
is this allso about nanoscale material
are nano particles real
Missy Reply
Hello, if I study Physics teacher in bachelor, can I study Nanotechnology in master?
Lale Reply
no can't
where is the latest information on a no technology how can I find it
where we get a research paper on Nano chemistry....?
Maira Reply
nanopartical of organic/inorganic / physical chemistry , pdf / thesis / review
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..
Even nanotechnology is pretty much all about chemistry... Its the chemistry on quantum or atomic level
no nanotechnology is also a part of physics and maths it requires angle formulas and some pressure regarding concepts
Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
Application of nanotechnology in medicine
has a lot of application modern world
what is variations in raman spectra for nanomaterials
Jyoti Reply
ya I also want to know the raman spectra
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.
yes that's correct
I think
Nasa has use it in the 60's, copper as water purification in the moon travel.
nanocopper obvius
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
How we are making nano material?
what is a peer
What is meant by 'nano scale'?
What is STMs full form?
scanning tunneling microscope
how nano science is used for hydrophobicity
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
what is differents between GO and RGO?
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
analytical skills graphene is prepared to kill any type viruses .
Any one who tell me about Preparation and application of Nanomaterial for drug Delivery
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
The nanotechnology is as new science, to scale nanometric
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
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