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

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Answer 46


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Answer 45


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Answer 44


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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.

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Answer 42


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Answer 41

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

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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.

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Answer 39


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Answer 38


The default values are:

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

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Answer 37


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Answer 36

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

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Answer 35


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Answer 34


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Answer 33


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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.

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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.

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Answer 30


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Answer 29


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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) .

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Answer 27


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Answer 26


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Answer 25


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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.

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Answer 23


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Answer 22


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Answer 21


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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.

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Answer 19


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Answer 18

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

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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.

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Answer 16


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Answer 15


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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.

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Answer 13

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

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Answer 12


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Answer 11


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Answer 10


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Answer 9


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Answer 8

False. The required command is shown in Listing 3 .

Listing 3 . Answer 8.
javac Prob01.java

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Answer 7


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Answer 6

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

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Answer 5


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Answer 4

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

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Answer 3


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Answer 2

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

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Answer 1


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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

An investment account was opened with an initial deposit of $9,600 and earns 7.4% interest, compounded continuously. How much will the account be worth after 15 years?
Kala Reply
lim x to infinity e^1-e^-1/log(1+x)
given eccentricity and a point find the equiation
Moses Reply
12, 17, 22.... 25th term
Alexandra Reply
12, 17, 22.... 25th term
College algebra is really hard?
Shirleen Reply
Absolutely, for me. My problems with math started in First grade...involving a nun Sister Anastasia, bad vision, talking & getting expelled from Catholic school. When it comes to math I just can't focus and all I can hear is our family silverware banging and clanging on the pink Formica table.
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
Jeannette has $5 and $10 bills in her wallet. The number of fives is three more than six times the number of tens. Let t represent the number of tens. Write an expression for the number of fives.
August Reply
What is the expressiin for seven less than four times the number of nickels
Leonardo Reply
How do i figure this problem out.
how do you translate this in Algebraic Expressions
linda Reply
why surface tension is zero at critical temperature
I think if critical temperature denote high temperature then a liquid stats boils that time the water stats to evaporate so some moles of h2o to up and due to high temp the bonding break they have low density so it can be a reason
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
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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