<< Chapter < Page Chapter >> Page >
Listing 9 . Answer 47.
mars.getPicture().addMessage( "Dick Baldwin",10,20);

Back to Question 47

Answer 46


Back to Question 46

Answer 45


Back to Question 45

Answer 44


Back to Question 44

Answer 43

False. Code in the println method calls a method named toString on each incoming object reference and displays the string value returned by that method.

Back to Question 43

Answer 42


Back to Question 42

Answer 41

False. Everything in Java is passed and returned by value , not by reference.

Back to Question 41

Answer 40

False. If there is a need to make the contents of those variables available outside the object, that should be accomplished by defining public accessor methods.

Back to Question 40

Answer 39


Back to Question 39

Answer 38


The default values are:

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

Back to Question 38

Answer 37


Back to Question 37

Answer 36

False. When an object is instantiated, the constructor returns a reference to the new object.

Back to Question 36

Answer 35


Back to Question 35

Answer 34


Back to Question 34

Answer 33


Back to Question 33

Answer 32

False. The code in Listing 5 instantiates one object of the World class and populates that world with two objects of the Turtle class.

Back to Question 32

Answer 31

False. The three variables declared in Listing 5 are reference variables (as opposed to primitive variables) . This means that they are capable of storing references to objects as opposed to simplybeing able to store values of the eight primitive types. It also means that they are incapable of storing values of the eight primitive types.

Back to Question 31

Answer 30


Back to Question 30

Answer 29


Back to Question 29

Answer 28

False. Because these variables are declared private , they can only be accessed by code contained in methods defined inside the same class (and in inner classes of the class, which is beyond the scope of this module) .

Back to Question 28

Answer 27


Back to Question 27

Answer 26


Back to Question 26

Answer 25


Back to Question 25

Answer 24

False. The method named println that is called in Listing 1 is a method belonging to a standard system object that represents the standardoutput device (usually the command-line screen) . The purpose of the println method is to display material on the command-line screen.

Back to Question 24

Answer 23


Back to Question 23

Answer 22


Back to Question 22

Answer 21


Back to Question 21

Answer 20


In general, the type of the variable must be:

  • The name of the class, or
  • The name of a superclass of the class, or
  • The name of an interface implemented by the class.

Back to Question 20

Answer 19


Back to Question 19

Answer 18

False. The period ahead of the semicolon in Listing 4 says to search the current folder first.

Back to Question 18

Answer 17

False. The purpose of the classpath is to tell the compiler and the virtual machine where to look for previously compiled class files that the applicationneeds in order to successfully compile and execute.

Back to Question 17

Answer 16


Back to Question 16

Answer 15


Back to Question 15

Answer 14

False. The Prob01.java and Prob01 at the ends of the two commands in Listing 4 specify the files being operated on by the compiler and the virtual machine respectively.

Back to Question 14

Answer 13

False. The Java compiler program is named javac.exe . The virtual machine is named java.exe .

Back to Question 13

Answer 12


Back to Question 12

Answer 11


Back to Question 11

Answer 10


Back to Question 10

Answer 9


Back to Question 9

Answer 8

False. The required command is shown in Listing 3 .

Listing 3 . Answer 8.
javac Prob01.java

Back to Question 8

Answer 7


Back to Question 7

Answer 6

False. The name of the application shown in Listing 1 is Prob01 .

Back to Question 6

Answer 5


Back to Question 5

Answer 4

False. Java applets do not require a method named main .

Back to Question 4

Answer 3


Back to Question 3

Answer 2

False. java.awt.Color belongs to the Java standard edition class library.

Back to Question 2

Answer 1


Back to Question 1


This section contains a variety of miscellaneous information.

Housekeeping material
  • Module name: Java3002r Review: Creating and Manipulating Turtles and Pictures in a World Object
  • File: Java3002r.htm
  • Published: 02/10/13

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.


Questions & Answers

find the 15th term of the geometric sequince whose first is 18 and last term of 387
Jerwin Reply
I know this work
The given of f(x=x-2. then what is the value of this f(3) 5f(x+1)
virgelyn Reply
hmm well what is the answer
how do they get the third part x = (32)5/4
kinnecy Reply
can someone help me with some logarithmic and exponential equations.
Jeffrey Reply
sure. what is your question?
okay, so you have 6 raised to the power of 2. what is that part of your answer
I don't understand what the A with approx sign and the boxed x mean
it think it's written 20/(X-6)^2 so it's 20 divided by X-6 squared
I'm not sure why it wrote it the other way
I got X =-6
ok. so take the square root of both sides, now you have plus or minus the square root of 20= x-6
oops. ignore that.
so you not have an equal sign anywhere in the original equation?
is it a question of log
I rally confuse this number And equations too I need exactly help
But this is not salma it's Faiza live in lousvile Ky I garbage this so I am going collage with JCTC that the of the collage thank you my friends
Commplementary angles
Idrissa Reply
im all ears I need to learn
right! what he said ⤴⤴⤴
what is a good calculator for all algebra; would a Casio fx 260 work with all algebra equations? please name the cheapest, thanks.
Kevin Reply
a perfect square v²+2v+_
Dearan Reply
kkk nice
Abdirahman Reply
algebra 2 Inequalities:If equation 2 = 0 it is an open set?
Kim Reply
or infinite solutions?
The answer is neither. The function, 2 = 0 cannot exist. Hence, the function is undefined.
Embra Reply
if |A| not equal to 0 and order of A is n prove that adj (adj A = |A|
Nancy Reply
rolling four fair dice and getting an even number an all four dice
ramon Reply
Kristine 2*2*2=8
Bridget Reply
Differences Between Laspeyres and Paasche Indices
Emedobi Reply
No. 7x -4y is simplified from 4x + (3y + 3x) -7y
Mary Reply
how do you translate this in Algebraic Expressions
linda Reply
Need to simplify the expresin. 3/7 (x+y)-1/7 (x-1)=
Crystal Reply
. After 3 months on a diet, Lisa had lost 12% of her original weight. She lost 21 pounds. What was Lisa's original weight?
Chris Reply
what's the easiest and fastest way to the synthesize AgNP?
Damian Reply
types of nano material
abeetha Reply
I start with an easy one. carbon nanotubes woven into a long filament like a string
many many of nanotubes
what is the k.e before it land
what is the function of carbon nanotubes?
I'm interested in nanotube
what is nanomaterials​ and their applications of sensors.
Ramkumar Reply
what is nano technology
Sravani Reply
what is system testing?
preparation of nanomaterial
Victor Reply
Yes, Nanotechnology has a very fast field of applications and their is always something new to do with it...
Himanshu Reply
good afternoon madam
what is system testing
what is the application of nanotechnology?
In this morden time nanotechnology used in many field . 1-Electronics-manufacturad IC ,RAM,MRAM,solar panel etc 2-Helth and Medical-Nanomedicine,Drug Dilivery for cancer treatment etc 3- Atomobile -MEMS, Coating on car etc. and may other field for details you can check at Google
anybody can imagine what will be happen after 100 years from now in nano tech world
after 100 year this will be not nanotechnology maybe this technology name will be change . maybe aftet 100 year . we work on electron lable practically about its properties and behaviour by the different instruments
name doesn't matter , whatever it will be change... I'm taking about effect on circumstances of the microscopic world
how hard could it be to apply nanotechnology against viral infections such HIV or Ebola?
silver nanoparticles could handle the job?
not now but maybe in future only AgNP maybe any other nanomaterials
I'm interested in Nanotube
this technology will not going on for the long time , so I'm thinking about femtotechnology 10^-15
can nanotechnology change the direction of the face of the world
Prasenjit Reply
At high concentrations (>0.01 M), the relation between absorptivity coefficient and absorbance is no longer linear. This is due to the electrostatic interactions between the quantum dots in close proximity. If the concentration of the solution is high, another effect that is seen is the scattering of light from the large number of quantum dots. This assumption only works at low concentrations of the analyte. Presence of stray light.
Ali Reply
the Beer law works very well for dilute solutions but fails for very high concentrations. why?
bamidele Reply
Got questions? Join the online conversation and get instant answers!
QuizOver.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?