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This module contains review questions and answers keyed to the module titled Jb0260: Java OOP: Command-Line Arguments.

Revised: Tue Mar 29 10:09:37 CDT 2016

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Table of contents

Preface

This module contains review questions and answers keyed to the module titled Jb0260: Java OOP: Command-Line Arguments .

The questions and the answers are connected by hyperlinks to make it easy for you to navigate from the question to the answer and back again.

Questions

Question 1 .

Provide a common example of a command-line statement that illustrates the use of command-line-arguments.

Answer 1

Question 2

Describe the purpose of command-line-arguments.

Answer 2

Question 3

True or false? In Java, syntax provisions must be made in the method signature for the main method to accommodate command-line-arguments even if the remainder of the program is not designed tomake use of them. If False, explain why.

Answer 3

Question 4

Provide the method signature for the main method in a Java application that is designed to accommodate the use of command-line-arguments.Identify the part of the method signature that applies to command-line-arguments and explain how it works.

Answer 4

Question 5

Explain how a Java application can determine the number of command-line-arguments actually entered by the user.

Answer 5

Question 6

Write a program that illustrates the handling of command-line arguments in Java.

Answer 6

Listings

  • Listing 1 . Handling command-line arguments in Java.

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

Answers

Answer 6

Listing 1 . Handling command-line arguments in Java.
/*File SampProg11.java from module 32 Copyright 1997, R.G.BaldwinWithout reviewing the following solution, write a Java application that illustrates the handling of command-linearguments in Java. Provide a termination message that displays your name.**********************************************************/ class SampProg11 { //define the controlling classpublic static void main(String[] args){ //define mainfor(int i=0; i<args.length; i++) System.out.println( args[i]); System.out.println("Terminating, Dick Baldwin");}//end main }//End SampProg11 class.

Back to Question 6

Answer 5

The number of command-line arguments is equal to the number of elements in the array of references to String objects referred to by args . The number of elements is indicated by the value of the length property of the array. If the value is zero, the user didn't enter anycommand-line arguments.

Back to Question 5

Answer 4

The Java syntax for command-line arguments is shown below.

Java syntax for command-line arguments. public static void main(String[] args){. . . }//end main method

Each of the elements in the array object referred to by args (including the element at position zero) contains a reference to a String object that encapsulates one of the command-line arguments.

Back to Question 4

Answer 3

True.

Back to Question 3

Answer 2

Command-line-arguments are used in many programming and computing environments to provide information to the program at startup that it will needto fulfill its mission during that particular invocation.

Back to Question 2

Answer 1

DOS users will be familiar with commands such as the following:

Command-line arguments in DOS copy fileA fileB

In this case, copy is the name of the program to be executed, while fileA and fileB are command-line arguments.

Back to Question 1

Miscellaneous

This section contains a variety of miscellaneous information.

Housekeeping material
  • Module name: Jb0260r Review: Command-Line Arguments
  • File: Jb0260r.htm
  • Originally published: 1997
  • Published at cnx.org: 11/25/12
Disclaimers:

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.

I also want you to know that, I receive no financial compensation from the Connexions website even if you purchase the PDF version ofthe module.

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.

-end-

Questions & Answers

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
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
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
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
NANO
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
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