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This module contains review questions and answers keyed to the module titled Jb0180: Java OOP: The main method.

Revised: Mon Mar 28 11:31:59 CDT 2016

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Table of contents


This module contains review questions and answers keyed to the module titled Jb0180: Java OOP: The main method .

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.


Question 1 .

Write the method signature for the main method in a Java application.

Answer 1

Question 2

Briefly explain the reason that the main method in a Java application is declared public .

Answer 2

Question 3

Explain the reason that the main method in a Java application must be declared static .

Answer 3

Question 4

Describe the purpose of the keyword void when used as the return type for the main method.

Answer 4

Question 5

True or false? If the Java application is not designed to use command-line arguments, it is not necessary to include a formal parameter for the main method.

Answer 5

Question 6

True or false? When using command-line arguments in Java, if the name of the string array is args , the args.length variable can be used by the code in the program to determine the number of arguments actually entered.

Answer 6

Question 7

True or false? The first string in the array of command-line arguments contains the name of the Java application

Answer 7

Question 8

The controlling class of every Java application must contain a main method. Can other classes in the same application also have a main method? If not, why not? If so, why might you want to do that?

Answer 8

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 8

Any and all classes in a Java application can have a main method. Only the one in the controlling class for the program being executed is actually called.

It is often desirable to provide a main method for a class that will not ultimately be the controlling class to allow the class to be tested in a stand-alone mode, independent of other classes.

Back to Question 8

Answer 7

False. Unlike C++, the first string in the array of command-line arguments in a Java application does not contain the name of the application.

Back to Question 7

Answer 6


Back to Question 6

Answer 5

False. The main method in a Java program must always provide the formal argument list regardless of whether it is actually used in the program.

Back to Question 5

Answer 4

The void keyword when used as the return type for any Java method indicates that the method does not return anything.

Back to Question 4

Answer 3

The keyword static indicates that the method is a class method which can be called without the requirement to instantiate an object of theclass. This is used by the Java virtual machine to launch the program by calling the main method of the class identified in the command to start the program.

Back to Question 3

Answer 2

The keyword public indicates that the method can be called by any object.

Back to Question 2

Answer 1

public static void main(String[] args)

Back to Question 1


This section contains a variety of miscellaneous information.

Housekeeping material
  • Module name: Jb0180r Review: The main method
  • File: Jb0180r.htm
  • Published: 11/21/12

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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
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 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
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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