<< Chapter < Page Chapter >> Page >

Back to Question 20

Answer 19

The name of the primitive type begins with a lower-case letter and the name of the wrapper type begins with an upper-case letter such as double and Double . Note that in some cases, however, that they are not spelled the same. For example, the Integer class is the wrapper for type int .

Back to Question 19

Answer 18

Wrapper classes

Back to Question 18

Answer 17

This has some ramifications as to how variables can be used (passing to methods, returning from methods, etc.) . For example, all variables of primitive types are passed by value to methods meaning that the code in the method only has access to a copy of the variable and does not have the abilityto modify the variable.

Back to Question 17

Answer 16

False. Primitive data types in Java (int, double, etc.) are not true objects.

Back to Question 16

Answer 15

True.

Back to Question 15

Answer 14

False. The char type in Java is a 16-bit Unicode character.

Back to Question 14

Answer 13

  • byte
  • short
  • int
  • long
  • float
  • double
  • char
  • boolean

Back to Question 13

Answer 12

Primitive types contain a single value.

Back to Question 12

Answer 11

Java supports both primitive types and reference (or object) types.

Back to Question 11

Answer 10

In Java, a variable of a specified type is represented exactly the same way regardless of the platform on which the application or applet is being executed.

Back to Question 10

Answer 9

False. In Java, all variables of type int contain signed values.

Back to Question 9

Answer 8

All variables in Java must have a defined type . The definition of the type determines the set of values that can be stored in the variable and theoperations that can be performed on the variable.

Back to Question 8

Answer 7

The syntax is shown in boldface below:

public static void main( String[] args )

In this case, the type of variable declared is an array of type String named args (type String[]) . The purpose of the String array variable in the argument list is to make it possible to capture arguments entered on the commandline.

Back to Question 7

Answer 6

False. Fortunately, Java provides very strict type checking and generally refuses to compile statements with type mismatches.

Back to Question 6

Answer 5

int firstVariable, secondVariable = 10;

Back to Question 5

Answer 4

False: In Java, it is possible to initialize the value of a variable when it is declared, but initialization is not required. (Note however that in some situations, the usage of the variable may require that it be purposely initialized.) .

Back to Question 4

Answer 3

To use a variable, you must notify the compiler of the name and the type of the variable (declare the variable).

Back to Question 3

Answer 2

variable

Back to Question 2

Answer 1

Listing 2 . Listing for Answer 1.
/*File simple4.java This application reads characters from the keyboard untilencountering the # character and echoes each character to the screen. The program terminates when the user entersthe # character. **********************************************************/class simple4 { //define the controlling class public static void main(String[]args) throws java.io.IOException {int ch1 = 0; System.out.println("Enter some text, terminate with #"); while( (ch1 = System.in.read() ) != '#')System.out.print((char)ch1); System.out.println("Goodbye");}//end main }//End simple4 class.

Back to Question 1

Miscellaneous

This section contains a variety of miscellaneous information.

Housekeeping material
  • Module name: Jb0200r: Review: Variables
  • File: Jb0200r.htm
  • Published: 11/23/12
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

The similarities and difference between the definition of prof Lionel Robbins and prof Paul ; A; Samuel son, each 5 definition
prince Reply
What are the basic concepts of economic
Taye Reply
With the aid of appropriate diagram differentiate between change in demand
Jones Reply
explain demand
Alaka Reply
Demand is a quantity of goods and services a consumer is willing to buy at given price in a period of time.
Aliado
who break in bulk
Alaka
what is demands and it law
matthew Reply
Demands, is the quantity of agoods a consumer is willing to buy at given price in a give period of time where as the law of demand states that, the higher the price, the lower the quantity demanded and the lower the price, the higher the quantity demanded by consumers
Aliado
what is division of labour
Sunday Reply
The similarities and difference between the definition of prof Lionel Robbins and prof Paul ; A; Samuel son, each 5 definition
prince
Demand is set to be enlastic when its what
bohvy Reply
more than boll had him had bhaag......
SHADAB
Cant you speak in English
john
a little
Tith
I do speak English.. the question is Demand is set to be elasticity went the dash *2
bohvy
if I want some document from,that 9k?
Tith
hi
muhammed
if both %^ Increase in input & %^ increase in output, then it is elastic and = to 1.
Rowda
Allah's Allah's last I'll be in the area around.....
SHADAB
Hy guyz
Vuyai
Hi
john
How are you all doing rumies
john
why is scarcity a fundamental problem in economic
Abubakar Reply
what is demand curve
Takyi Reply
xplain
Ubong
thanks for your help with the same....
SHADAB
What is elasticity of demand
Karim
what is unemployment
Alaka
what is opportunity cost
Samuel Reply
Opportunity cost which also mean real cost it is a term used for foregone alternatives
john
what is demand
ikea Reply
Demand may simply be define as the total quantity of good or service a consumer are willing to buy at a specific price within a period of time.
john
your language is tough
techy Reply
How economics is related to other subjects?
Mikateko Reply
It is social science related subjects
john
How ? explain
Mikateko
and something else help me about business cycle
Mikateko
s classified as a social science. This view makes eco­nomics an academic relative of political science, sociology, psychology and anthropology. All of these disciplines study the behaviour of human beings individually and in groups.
john
The business cycle describes the rise and fall in production output of goods and services in an economy. Business cycles are generally measured using the rise and fall in the real gross domestic product (GDP) or the GDP.
john
hello everyone
Selena
hii
Yes
hello selena
Yes
How are you doing every one
john
hello Selena
Yes
hi
NONSO
yes
NONSO
What Is Economic Growth?
Saviour Reply
is the increase of quantity of goods ans services
Hashi
what is economic
Yomina Reply
Economic may be define as the science which studies human behaviour in relationship with end and scarce which have alternative use. This definition was drafted by Lionel robbin
john
good
Tith
it is science of wealth.
SHADAB
if I want some documents from you ,Are you ok?
Tith
it is not only wealth as well as welfare also.as well as scarce means of ends,for human satisfaction for alternative uses.
Avijit
economics applications
techy
While the American heart association suggests that meditation might be used in conjunction with more traditional treatments as a way to manage hypertension
Beverly Reply
Researchers demonstrated that the hippocampus functions in memory processing by creating lesions in the hippocampi of rats, which resulted in ________.
Mapo Reply
The formulation of new memories is sometimes called ________, and the process of bringing up old memories is called ________.
Mapo Reply
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