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Figure 4 . Answer 13.
Java3010rb.java:47: error: cannot find symbol return (refToObj).getData();^ symbol: method getData()location: variable refToObj of type Object 1 error

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Answer 12

False. Every class that doesn't explicitly extend another class automatically extends the class named Object .

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Answer 11

False. An anonymous object is an object whose reference is not saved in a named reference variable. An anonymous class is something entirely different.

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Answer 10

True. Listing 2 shows an example of this syntax. (Note the use of the curly brackets in Listing 2 as opposed to the use of square brackets in Listing 1 .)

Listing 2 . Answer 10.
Object[] objRef = {new Java3010raMyClassA(randomNumber)};

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Answer 9

False. Every array object contains a special property named length that contains the number of elements in an array. It is always possible todetermine the number of elements in an array object at runtime by accessing the value of the length property for the array object.

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Answer 8

True.

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Answer 7

False. The array structure that is encapsulated in an array object may have none, one, or more elements.

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Answer 6

False. Unless code is written to do otherwise, the elements in a new array object are initialized with the standard default values for the types involved (zero, false , or null) .

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Answer 5

False. When the declared type of an array is the type of an object (array object or ordinary object), references to the objects are stored in thearray elements and the objects actually exist elsewhere in memory.

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Answer 4

True.

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Answer 3

True.

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Answer 2

True. Multidimensional arrays are created by creating tree structures of one-dimensional array objects.

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Answer 1

False. The program produces the compiler error shown in Figure 2 .

Figure 2 . Answer 1.
Java3010ra.java:12: error: illegal start of expression Object[]objRef = [new Java3010raMyClassA(randomNumber)];^ Java3010ra.java:12: error: ';' expectedObject[] objRef = [new Java3010raMyClassA(randomNumber)];

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Miscellaneous

This section contains a variety of miscellaneous information.

Housekeeping material
  • Module name: Java3010r Review
  • File: Java3010.htm
  • Published: 02/14/13
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

how do you translate this in Algebraic Expressions
linda Reply
why surface tension is zero at critical temperature
Shanjida
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 is biological synthesis of nanoparticles
Sanket Reply
what's the easiest and fastest way to the synthesize AgNP?
Damian Reply
China
Cied
types of nano material
abeetha Reply
I start with an easy one. carbon nanotubes woven into a long filament like a string
Porter
many many of nanotubes
Porter
what is the k.e before it land
Yasmin
what is the function of carbon nanotubes?
Cesar
I'm interested in nanotube
Uday
what is nanomaterials​ and their applications of sensors.
Ramkumar Reply
what is nano technology
Sravani Reply
what is system testing?
AMJAD
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
AMJAD
what is system testing
AMJAD
what is the application of nanotechnology?
Stotaw
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
Azam
anybody can imagine what will be happen after 100 years from now in nano tech world
Prasenjit
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
Azam
name doesn't matter , whatever it will be change... I'm taking about effect on circumstances of the microscopic world
Prasenjit
how hard could it be to apply nanotechnology against viral infections such HIV or Ebola?
Damian
silver nanoparticles could handle the job?
Damian
not now but maybe in future only AgNP maybe any other nanomaterials
Azam
Hello
Uday
I'm interested in Nanotube
Uday
this technology will not going on for the long time , so I'm thinking about femtotechnology 10^-15
Prasenjit
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
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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