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Listing 4 . Listing for Question 4.
import java.util.NoSuchElementException; public class Ap154{public static void main( String args[]){ new Worker().doIt();}//end main() }//end class Ap154class Worker{ void doIt(){MyContainer ref = new MyContainer();ref.put(0,5); ref.put(1,10);ref.put(2,15);System.out.print(ref.get(0)+" "); System.out.print(ref.get(1)+" ");System.out.print(ref.get(2)+" "); System.out.print(ref.get(3)+" ");}//end doIt() }// end class Workerclass MyContainer{ private int[]array = new int[3];public void put(int idx, int data){if(idx>(array.length-1)){ throw newNoSuchElementException(); }else{array[idx] = data;}//end else }//end put()public int get(int idx){if(idx>(array.length-1)){ throw newNoSuchElementException(); }else{return array[idx];}//end else }//end put()}//end class MyContainer

Answer and Explanation

Question 5

The source code in Listing 5 is contained in a single file named Ap155.java

What output is produced by the program?

  • A. Compiler Error
  • B. Runtime Error
  • C. OK
  • D. None of the above.
Listing 5 . Listing for Question 5.
public class Ap155{ public static void main(String args[]){new Ap155a().doIt(); }//end main()}//end class Ap155 public class Ap155a{void doIt(){ System.out.println("OK");}//end doIt() }// end class Ap155a

Answer and Explanation

Question 6

A Java application consists of the two source files shown in Listing 6 and Listing 7 having names of AP156.java and AP156a.java

What output is produced by this program?

  • A. Compiler Error
  • B. Runtime Error
  • C. OK
  • D. None of the above.
Listing 6 . Listing for Question 6.
public class Ap156{ public static void main(String args[]){new Ap156a().doIt(); }//end main()}//end class Ap156
Listing 7 . Listing for Question 6.
public class Ap156a{ void doIt(){System.out.println("OK"); }//end doIt()}// end class Ap156a

Answer and Explanation

Question 7

Explain the purpose of the terms @param and @return in Listing 8 . Also explain any of the other terms that make sense to you.

Listing 8 . Listing for Question 7.
public class Ap157{/** * Returns the character at the* specified index. An index ranges from *<code>0</code>to *<code>length() - 1</code>. ** @param index index of desired * character.* @return the desired character. */public char charAt(int index) { //Note, this method is not intended// to be operational. Rather, it // ...return 'a';//return dummy char }//end charAt method}//end class

Answer and Explanation

Question 8

What output is produced by the program shown in Listing 9 ?

  • A. Compiler Error
  • B. Runtime Error
  • C. Tom
  • D. None of the above.
Listing 9 . Listing for Question 8.
public class Ap158{ public static void main(String args[]){new Worker().doIt(); }//end main()}//end class Ap158 class Worker{void doIt(){ char[]ref; System.out.print(ref);System.out.print(" "); ref[0]= 'T'; ref[1]= 'o'; ref[2]= 'm'; System.out.println(ref);}//end doIt() }// end class Worker

Answer and Explanation

Questions & Answers

what are the products of Nano chemistry?
Maira Reply
There are lots of products of nano chemistry... Like nano coatings.....carbon fiber.. And lots of others..
learn
Even nanotechnology is pretty much all about chemistry... Its the chemistry on quantum or atomic level
learn
Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
Jyoti Reply
I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
Damian
yes that's correct
Professor
I think
Professor
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
if virus is killing to make ARTIFICIAL DNA OF GRAPHENE FOR KILLED THE VIRUS .THIS IS OUR ASSUMPTION
Anam
analytical skills graphene is prepared to kill any type viruses .
Anam
Any one who tell me about Preparation and application of Nanomaterial for drug Delivery
Hafiz
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
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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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