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Answer 5

True. The JSONArray class provides two overloaded versions of the method named toJSONString . One is an instance method and the other is a static method. On a side note, this is also true of the class named JSONObject .

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Answer 4

False. The code in Listing 2 produces the screen output shown in Figure 4 . Unlike an object of the JSONObject class, an object of the JSONArray class is an ordered list. By this we meanthat the user has precise control over where in the list each element is inserted. The user can access elements by their integer index (position in the list) .

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Answer 3

False. The code in Listing 1 produces the screen output with the errors shown in Figure 2 . The JSONArray class neither defines nor inherits a method named put .

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Answer 2

False. The JSONArray class extends the ArrayList class, which implements the List interface. Therefore, an object of the JSONArray class is a list and is not an array. For example, the elements in a JSONArray object cannot be accessed using the square bracket ([]) notation commonly associated with Java arrays. Instead, the elements are accessed using the add and get methods declared in the List interface and inherited from the ArrayList class.

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Answer 1

False. The JSONArray class extends the standard Java ArrayList class.

Go back to Question 1

Figures

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

Figure 1

[{"Name":"Tom"},{"Age":21},{"Student":true}]

Figure 2

Code01.java:22: error: cannot find symbol array.put(jsonObj01);^ symbol: method put(JSONObject)location: variable array of type JSONArray Code01.java:23: error: cannot find symbolarray.put(jsonObj02); ^symbol: method put(JSONObject) location: variable array of type JSONArrayCode01.java:24: error: cannot find symbol array.put(jsonObj03);^ symbol: method put(JSONObject)location: variable array of type JSONArray 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 Press any key to continue . . .

Figure 3

[{"Name":"Tom"},{"Age":21},{"Student":true}]

Figure 4

[{"Name":"Tom"},{"Student":true},{"Age":21}]

Figure 5

[{"Name":"Tom"},{"Age":21},{"Student":true}] [{"Name":"Tom"},{"Age":21},{"Student":true}]

Figure 6

{"person":[{"Student":true},{"Age":21},{"Name":"Tom"}]}

Figure 7

[{"Student":true},{"Age":21},{"Name":"Tom"}]

Figure 8

{"person":[{"Name":"Tom"},{"Age":21},{"Name":"Tom"}]}

Listings

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

Listing 1

/************************************************ Copyright: R.G.Baldwin 2016Tested with Java 8, Windows 7, and json-simple-1.1.1.************************************************/ import org.json.simple.JSONObject;import org.json.simple.JSONArray; class Code01{public static void main(String[] args){JSONObject jsonObj01 = new JSONObject(); jsonObj01.put("Name","Tom");JSONObject jsonObj02 = new JSONObject(); jsonObj02.put("Age",21);JSONObject jsonObj03 = new JSONObject(); jsonObj03.put("Student",true);JSONArray array = new JSONArray();array.put(jsonObj01); array.put(jsonObj02);array.put(jsonObj03); System.out.println(array.toJSONString());}//end main}//end class Code01

Questions & Answers

what is defense mechanism
Chinaza Reply
what is defense mechanisms
Chinaza
I'm interested in biological psychology and cognitive psychology
Tanya Reply
what does preconceived mean
sammie Reply
physiological Psychology
Nwosu Reply
How can I develope my cognitive domain
Amanyire Reply
why is communication effective
Dakolo Reply
Communication is effective because it allows individuals to share ideas, thoughts, and information with others.
effective communication can lead to improved outcomes in various settings, including personal relationships, business environments, and educational settings. By communicating effectively, individuals can negotiate effectively, solve problems collaboratively, and work towards common goals.
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miss
Every time someone flushes a toilet in the apartment building, the person begins to jumb back automatically after hearing the flush, before the water temperature changes. Identify the types of learning, if it is classical conditioning identify the NS, UCS, CS and CR. If it is operant conditioning, identify the type of consequence positive reinforcement, negative reinforcement or punishment
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Wekolamo
because it helps many people around the world to understand how to interact with other people and understand them well, for example at work (job).
Manix Reply
Agreed 👍 There are many parts of our brains and behaviors, we really need to get to know. Blessings for everyone and happy Sunday!
ARC
A child is a member of community not society elucidate ?
JESSY Reply
Isn't practices worldwide, be it psychology, be it science. isn't much just a false belief of control over something the mind cannot truly comprehend?
Simon Reply
compare and contrast skinner's perspective on personality development on freud
namakula Reply
Skinner skipped the whole unconscious phenomenon and rather emphasized on classical conditioning
war
explain how nature and nurture affect the development and later the productivity of an individual.
Amesalu Reply
nature is an hereditary factor while nurture is an environmental factor which constitute an individual personality. so if an individual's parent has a deviant behavior and was also brought up in an deviant environment, observation of the behavior and the inborn trait we make the individual deviant.
Samuel
I am taking this course because I am hoping that I could somehow learn more about my chosen field of interest and due to the fact that being a PsyD really ignites my passion as an individual the more I hope to learn about developing and literally explore the complexity of my critical thinking skills
Zyryn Reply
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Jonathan
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Jonathan
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interpersonal relationships
Abdulfatai 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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