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Figure index

Listing index

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Answers

Answer 11

True.

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Answer 10

False. The code in Listing 6 produces the screen output with the errors shown in Figure 10 .

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Answer 9

False. The code in Listing 5 produces the screen output shown in Figure 8 . The parse method is not static in the JSONParser class.

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Answer 8

True.

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Answer 7

True. Even though it is not necessary to instantiate an object of a class to call a static method belonging to that class, it is possible to instantiate an object of the JSONValue class and to call the static parse method on that object.

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Answer 6

False. The code in Listing 2 produces the screen output with the compiler errors shown in Figure 4 . The return value from the parse method must be cast from type Object to type JSONObject to store it in a variable of type JSONObject .

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Answer 5

False. The code in Listing 1 produces the screen output with the compiler errors shown in Figure 2 . The json-simple library does not define a class named JSONString .

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Answer 4

False. The json-simple library does not define a class named JSONString . Both parse methods return a reference of type java.lang.Object . However, it is actually a reference to an object of the class JSONObject , which is a subclass of Object several levels down. The reference must be downcast to type JSONObject in order to call some of the methods defined in the JSONObject class or to store the object's reference in a variable of type JSONObject .

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Answer 3

False. The parse method belonging to the class named JSONParser is not declared static . Therefore, it is an instance method . Instance methods can only be called on an object instantiated from the class.

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Answer 2

False. The parse method that is defined in the class named JSONValue is a static method. Static methods belonging to a class can be called without the requirement toinstantiate an object of the class.

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Answer 1

False. The class named JSONValue also defines a method named parse that can be used to decode or parse a JSON string.

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Figures

This section contains Figures that may be referred to by one or more questions or answers.

Figure 1

Joe 21

Figure 2

Code01.java:8: error: cannot find symbol import org.json.simple.JSONString;^ symbol: class JSONStringlocation: package org.json.simple Code01.java:20: error: cannot find symbolJSONString jsonString02 = JSONValue.parse(jsonString0101); ^symbol: class JSONString location: class Code01Code01.java:20: error: cannot find symbol JSONString jsonString02 = JSONValue.parse(jsonString0101);^ symbol: variable jsonString0101location: class Code01 Note: Code01.java uses unchecked or unsafe operations.Note: Recompile with -Xlint:unchecked for details. 3 errorsError: Could not find or load main class Code01

Questions & Answers

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 to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
Maciej
characteristics of micro business
Abigail
for teaching engĺish at school how nano technology help us
Anassong
Do somebody tell me a best nano engineering book for beginners?
s. Reply
there is no specific books for beginners but there is book called principle of nanotechnology
NANO
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
s.
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
Tarell
what is the actual application of fullerenes nowadays?
Damian
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
Tarell
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
Virgil
is Bucky paper clear?
CYNTHIA
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
NANO
so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
Harper
Do you know which machine is used to that process?
s.
how to fabricate graphene ink ?
SUYASH Reply
for screen printed electrodes ?
SUYASH
What is lattice structure?
s. Reply
of graphene you mean?
Ebrahim
or in general
Ebrahim
in general
s.
Graphene has a hexagonal structure
tahir
On having this app for quite a bit time, Haven't realised there's a chat room in it.
Cied
what is biological synthesis of nanoparticles
Sanket Reply
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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