Overriding the method “toString()” Program plan: Filename: “Question.java” This program file is used to define a class “Question”. In the code, Define a class “Question”. Define the class members. Define the constructor “Question()”. Set question to the “text”. Set empty answer to “answer”. Define a method “setAnswer()”. Set the “correctResponse” to “answer”. Define a method “checkAnswer()”. Return the value. Define a method “display()”. Print the value of “text”. Define a method “toString()”. And this method overrides the inherited “toString()” method. Return the “text” and “answer” of runtime class. Filename: “ChoiceQuestion.java” This program file is used to define a class “ChoiceQuestion”. In the code, Import the required packages. Define a class “ChoiceQuestion” as extending from “Question”. Define the class member array list “choices”. Define the constructor “ChoiceQuestion()”. Create array list with question and no choices. Define a method “addChoice()”. Add choice to “choices”. If the condition is true, Set “choiceString”. Call “setAnswer()”. Define the method “display()”. Call the method “display()”. Iterate a “for” loop, Set the value of “choiceNumber”. Print the choices. Define the method “toString()”. Return the choices. Filename: “QuestionTester.java” This program file is used to define a class “QuestionTester”. In the code, Import the required packages. Define a class “QuestionTester”. Define the method “main()”. Define the object “q” of “Question”. Get the runtime class using “getClass()”. Get the runtime method using “getMethod()”. Set the value of “isOverridden” as “true” if the method “toString()” is overridden. Print the value of “isOverridden”. Print the expected value. Define the object “q2” of “Question”. Get the runtime class using “getClass()”. Get the runtime method using “getMethod()”. Set the value of “isOverridden” as “true” if the method “toString()” is overridden. Print the value of “isOverridden”. Print the expected value.

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Chapter 9, Problem 7PE

Program Plan Intro

Overriding the method “toString()”

Program plan:

Filename: “Question.java”

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

Define a class “Question”.

Define the class members.

Define the constructor “Question()”.

Set question to the “text”.

Set empty answer to “answer”.

Define a method “setAnswer()”.

Set the “correctResponse” to “answer”.

Define a method “checkAnswer()”.

Return the value.

Define a method “display()”.

Print the value of “text”.

Define a method “toString()”. And this method overrides the inherited “toString()” method.

Return the “text” and “answer” of runtime class.

Filename: “ChoiceQuestion.java”

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

Import the required packages.

Define a class “ChoiceQuestion” as extending from “Question”.

Define the class member array list “choices”.

Define the constructor “ChoiceQuestion()”.

Create array list with question and no choices.

Define a method “addChoice()”.

Add choice to “choices”.

If the condition is true,

Set “choiceString”.

Call “setAnswer()”.

Define the method “display()”.

Call the method “display()”.

Iterate a “for” loop,

Set the value of “choiceNumber”.

Print the choices.

Define the method “toString()”.

Return the choices.

Filename: “QuestionTester.java”

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

Import the required packages.

Define a class “QuestionTester”.

Define the method “main()”.

Define the object “q” of “Question”.

Get the runtime class using “getClass()”.

Get the runtime method using “getMethod()”.

Set the value of “isOverridden” as “true” if the method “toString()” is overridden.

Print the value of “isOverridden”.

Print the expected value.

Define the object “q2” of “Question”.

Get the runtime class using “getClass()”.

Get the runtime method using “getMethod()”.

Set the value of “isOverridden” as “true” if the method “toString()” is overridden.

Print the value of “isOverridden”.

Print the expected value.

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