BIG JAVA: LATE OBJECTS
BIG JAVA: LATE OBJECTS
2nd Edition
ISBN: 9781119626220
Author: Horstmann
Publisher: WILEY
Question
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Chapter 9, Problem 2PE
Program Plan Intro

Quiz Question

Program plan:

Filename: “Question.java”

This program file is used to define a class “Question”. In the code,

  • Define a class “Question”.
    • Declare class variables “text” and “answer”.
    • Define a constructor “Question()”.
      • Initialize the “text” and “answer”.
    • Define a method “setAnswer()”.
      • Initialize the value of “answer”.
    • Define a method “checkAnswer()”.
      • Return the value.
    • Define a method “display()”.
      • Print the value of “text”.

Filename: “FillInQuestion.java”

This program file is used to define a class “FillInQuestion” as extending from “Question”. In the code,

  • Define a class “FillInQuestion”.
    • Define a constructor “FillInQuestion()”.
      • Set the values.
    • Define a method “removeAnswer()”.
      • Set the value of “start”.
      • Set the value of “end”.
      • Return the value.

Filename: “QuestionDemo.java”

This program file is used to define a class “QuestionDemo” to test the class “FillInQuestion”. In the code,

  • Define a class “QuestionDemo”.
    • Define a method “main()”.
    • Declare an array of objects.
    • Create the object “question0”of “FillInQuestion”.
    • Set a value of “question0” to “quiz[0]”.
    • Create the object “question1”of “FillInQuestion”.
    • Set a value of “question1” to “quiz[1]”.
    • Create an object of “Scanner” class.
    • Iterate a “for” loop.
      • Call the method “display”.
      • Prompt the user to enter the answer.
      • Scan for the value.
      • Call the method “checkAnswer()” and print the result.

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Chapter 9 Solutions

BIG JAVA: LATE OBJECTS

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