<< Chapter < Page Chapter >> Page >
Figure 5 - Question 5.
class java.awt.Frame class java.awt.Frameclass java.awt.Window class java.awt.Windowclass javax.swing.JFrame class javax.swing.JFrame

Answer 5

Question 6

True or False: The code shown in Listing 6 will compile and run successfully producing the output shown in Figure 6 .

Listing 6 - Question 6.

/*File Q06.java ************************************************/import java.util.ArrayList; import java.awt.Window;import java.awt.Frame; import javax.swing.JFrame;public class Q06{ /*Given: Component extends ObjectContainer extends Component Window extends ContainerFrame extends Window JFrame extends FrameThe getClass method is defined in the Object class. When called on a reference to an object,the method returns the name of the class from which the object was instantiated.*/ public static void main(String[]args){ Frame frame0 = new Frame("Frame0");ArrayList<Frame>listA = new ArrayList<>(); listA.add(frame0);listA.add(new Frame("Frame1")); display(listA);ArrayList<Window>listB = new ArrayList<>(); listB.add(new Window(frame0));listB.add(new Window(frame0)); display(listB);ArrayList<JFrame>listC = new ArrayList<>(); listC.add(new JFrame("JFrame0"));listC.add(new JFrame("JFrame1")); display(listC);}//end main //-------------------------------------------//static void display( ArrayList<? super Frame>list){ for(Object n : list){System.out.println(n.getClass()); }//end for loopSystem.out.println();//blank line }//end display}//end class Q06
Figure 6 - Question 6.
class java.awt.Frame class java.awt.Frameclass java.awt.Window class java.awt.Windowclass javax.swing.JFrame class javax.swing.JFrame

Answer 6

Figures

Listings

What is the meaning of the following two images?

These images were 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.

Spacer image of a rabbit and a penguin.

This image was also inserted for the purpose of inserting space between the questions and the answers.

Spacer image of a penguin and some houses.

Answers

Answer 6

False. This program attempts to illustrate the use of a lower bounded wildcard to define a generic method that will accept an incoming reference to anobject of a generic class where the parameter type for the object is equal to or above the type of the wildcard in the inheritance hierarchy. The lower boundedwildcard type for the display method is Frame. Therefore, the display method will accept references to ArrayList objects for parameter types Frame, Window,Container, Component, or Object, but it will not accept a reference to an ArrayList object for parameter type JFrame. Therefore, the program will notcompile, resulting in the error shown in Figure 7 .

Questions & Answers

what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
Rafiq
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
Damian
How we are making nano material?
LITNING Reply
what is a peer
LITNING Reply
What is meant by 'nano scale'?
LITNING Reply
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
how nano science is used for hydrophobicity
Santosh
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
Rafiq
what is differents between GO and RGO?
Mahi
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
Rafiq
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
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
How can I make nanorobot?
Lily
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
how can I make nanorobot?
Lily
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
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
Privacy Information Security Software Version 1.1a
Good
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