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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

what is mutation
Janga Reply
what is a cell
Sifune Reply
how is urine form
Sifune
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mahase Reply
classification of plants, gymnosperm features.
Linsy Reply
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Linsy
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What is Atoms
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Merolyn
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Eduek Reply
urine is formed in the nephron of the renal medulla in the kidney. It starts from filtration, then selective reabsorption and finally secretion
onuoha Reply
State the evolution relation and relevance between endoplasmic reticulum and cytoskeleton as it relates to cell.
Jeremiah
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Konadu Reply
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Konadu
how is urine formed in human
Rahma
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Pelagie Reply
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Diamond
malaria is caused by an insect called mosquito.
Naomi
Malaria is cause by female anopheles mosquito
Isaac
Malaria is caused by plasmodium Female anopheles mosquitoe is d carrier
Olalekan
a canal is more needed in a root but a cavity is a bad effect
Commander
what are pathogens
Don Reply
In biology, a pathogen (Greek: πάθος pathos "suffering", "passion" and -γενής -genēs "producer of") in the oldest and broadest sense, is anything that can produce disease. A pathogen may also be referred to as an infectious agent, or simply a germ. The term pathogen came into use in the 1880s.[1][2
Zainab
A virus
Commander
Definition of respiration
Muhsin Reply
respiration is the process in which we breath in oxygen and breath out carbon dioxide
Achor
how are lungs work
Commander
where does digestion begins
Achiri Reply
in the mouth
EZEKIEL
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Rashima Reply
stimulates the follicle to release the mature ovum into the oviduct
Davonte
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Chinaza
endocrine secrete hormone and regulate body process
Achor
while pituitary gland is an example of endocrine system and it's found in the Brain
Achor
what's biology?
Egbodo Reply
Biology is the study of living organisms, divided into many specialized field that cover their morphology, physiology,anatomy, behaviour,origin and distribution.
Lisah
biology is the study of life.
Alfreda
Biology is the study of how living organisms live and survive in a specific environment
Sifune
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