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Answer 12

Question 13

Give a brief description of the concept of a string and list the names of two classes used to implement strings?

Answer 13

Question 14

What is the syntax that is used to create a literal string? Provide a code fragment to illustrate your answer.

Answer 14

Question 15

Explain the difference between objects of types String and StringBuffer .

Answer 15

Question 16

Provide a code fragment that illustrates how to concatenate strings.

Answer 16

Question 17

Provide a code fragment that declares and instantiates an array object capable of storing references to two String objects. Explain what happens when this code fragment is executed. Then show a code fragment that will allocate memory forthe actual String objects.

Answer 17

Question 18

Write a Java application that illustrates the creation and manipulationof a two-dimensional array with the sub arrays being of different lengths.Also cause your application to illustrate that an attempt to access an array element out of bounds results in anexception being thrown. Catch and process the exception. Display a termination message with your name.

Answer 18

Listings

What is the meaning of the following two images?

This image was 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.

The image is also an example of the kinds of things that we do in my course titled ITSE 2321, Object-Oriented Programming.

Missing image

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

Missing image

Answers

Answer 18

Listing 1 . Listing for Answer 18.
class SampProg10 { //define the controlling class public static void main(String[]args){ //define main //Declare a two-dimensional array with a size of 3 on// the primary dimension but with different sizes on // the secondary dimension.//Secondary size not specified int[][] myArray = new int[3][];myArray[0] = new int[2];//secondary size is 2 myArray[1]= new int[3];//secondary size is 3myArray[2] = new int[4];//secondary size is 4 //Fill the array with datafor(int i = 0; i<3; i++){ for(int j = 0; j<myArray[i].length; j++){myArray[i][j]= i * j; }//end inner loop}//end outer loop //Display data in the arrayfor(int i = 0; i<3; i++){ for(int j = 0; j<myArray[i].length; j++){System.out.print(myArray[i][j]); }//end inner loopSystem.out.println(); }//end outer loop//Attempt to access an out-of-bounds array element try{System.out.println( "Attempt to access array out of bounds");myArray[4][0]= 7; }catch(ArrayIndexOutOfBoundsException e){System.out.println(e); }//end catchSystem.out.println("Terminating, Dick Baldwin");}//end main }//End SampProg10 class. Note no semicolon required

Back to Question 18

Answer 17

The following statement declares and instantiates an array object capable of storing references to two String objects.

String[] myArrayOfStringReferences = new String[2];

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
what is the features of gymnosperm
Linsy
how many types of solid did we have
Samuel Reply
what is an ionic bond
Samuel
What is Atoms
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Merolyn
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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
what is heart
Konadu Reply
how is urine formed in human
Konadu
how is urine formed in human
Rahma
what is the diference between a cavity and a canal
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
what are the functions of follicle stimulating harmones?
Rashima Reply
stimulates the follicle to release the mature ovum into the oviduct
Davonte
what are the functions of Endocrine and pituitary gland
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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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
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