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Answer 5

A. Compiler Error

Explanation 5

Public classes in separate files

Java requires that the source code for every public class be contained in a separate file. In this case, the source code for two public classes wascontained in a single file. The following compiler error was produced by JDK 1.3:

Ap155.java:18: class Ap155a is public, should be declared in a file named Ap155a.javapublic class Ap155a{

Back to Question 5

Answer 4

This program produces both of the following:

  • C. 5 10 15
  • B. Runtime Error

Explanation 4

The NoSuchElementException

This program defines, creates, and uses a very simple container object for the purpose of illustrating the NoSuchElementException .

The code in the following fragment shows the beginning of a class named MyContainer from which the container object is instantiated.

class 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()

A wrapper for an array object

This class is essentially a wrapper for a simple array object of type int . An object of the class provides a method named put , which can be used to store an int value into the array. The put method receives two parameters. The first parameter specifies the index of the elementwhere the value of the second parameter is to be stored.

Throw NoSuchElementException on index out of bounds

The put method tests to confirm that the specified index is within the positive bounds of the array. If not, it uses the throw keyword to throw an exception of the type NoSuchElementException . Otherwise, it stores the incoming data value in the specified index position in the array.

(Note that a negative index will cause an ArrayIndexOutOfBoundsException instead of a NoSuchElementException to be thrown.)

The get method

An object of the MyContainer class also provides a get method that can be used to retrieve the value stored in a specified index.

public int get(int idx){ if(idx>(array.length-1)){ throw newNoSuchElementException(); }else{return array[idx];}//end else }//end put()

The get method also tests to confirm that the specified index is within the positive bounds of the array. If not, it throws an exceptionof the type NoSuchElementException . Otherwise, it returns the value stored in the specified index of the array.

(As noted earlier, a negative index will cause an ArrayIndexOutOfBoundsException instead of a NoSuchElementException to bethrown.)

The NoSuchElementException

Thus, this container class illustrates the general intended purpose of the NoSuchElementException .

Instantiate and populate a container

The remainder of the program simply exercises the container. The code in the following fragment instantiates a new container, and uses the put method to populate each of its three available elements with the values 5, 10,and 15.

void doIt(){ MyContainer ref =new MyContainer(); ref.put(0,5);ref.put(1,10); ref.put(2,15);

Questions & Answers

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
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 did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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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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