Big Java Late Objects
2nd Edition
ISBN: 9781119330455
Author: Horstmann
Publisher: WILEY
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Question
Chapter 12, Problem 3PP
Program Plan Intro
Quiz
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 a abstract method “read()”.
- Define a method “check()”.
- Return the value.
- Define a method “getText()”.
- Return the “text”.
- Define a method “getAnswer()”.
- Return the “answer”
- Define a method “setText()”.
- Set the value of “text”.
- Define a method “setAnswer()”.
- Set the value of “answer”.
Filename: “NumberQuestion.java”
This program file is used to define a class “NumberQuestion”. In the code,
- Import the required packages.
- Define a class “NumberQuestion” as extending from “Question”.
- Define the class member “EPSILON”.
- Define the method “read()”.
- Get the value of “text”.
- Get the value of “answer”.
- Call the method “setText()” to set the value of “text”.
- Call the method “setAnswer()” to set the value of “answer”.
- Define the method “check()”.
- Define a “try” block.
- Set the answer to “a”.
- Set the response to “r”.
- Check whether “Math.abs(a-r)” is less than “EPSILON” and return the Boolean result.
- Define the “catch” block to catch the exception.
-
- Return Boolean value “false”.
- Define a “try” block.
Filename: “TextQuestion.java”
This program file is used to define a class “TextQuestion”. In the code,
- Import the required packages.
- Define a class “TextQuestion” as extending from “Question”.
- Define the method “read()”.
- Get the value of “text”.
- Get the value of “answer”.
- Call the method “setText()” to set the value of “text”.
- Call the method “setAnswer()” to set the value of “answer”.
- Define the method “read()”.
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 “try”.
- Iterate a “while” loop,
- If the “type” is equal to “T”,
-
- Define the object of “Question”.
- Using the object read the file for input.
- Call the method “getText()” and print the value.
- Print the expected question.
- Call the method “getAnswer()” and print the value.
- Print the expected answer.
- Call the method “check()”.
- Print the expected value.
- Else if the “type” is equal to “N”.
-
- Define the object of “Question”.
- Using the object read the file for input.
- Call the method “getText()” and print the value.
- Print the expected question.
- Call the method “getAnswer()” and print the value.
- Print the expected answer.
- Call the method “check()”.
- Print the expected value.
- Else,
-
- Print the statement.
- Iterate a “while” loop,
- Define “catch” block.
- Print the message to user.
- Define the “try”.
- Define the method “main()”.
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Chapter 12 Solutions
Big Java Late Objects
Ch. 12.1 - Prob. 1SCCh. 12.1 - Prob. 2SCCh. 12.1 - Prob. 3SCCh. 12.1 - Prob. 4SCCh. 12.1 - Prob. 5SCCh. 12.2 - Prob. 6SCCh. 12.2 - Prob. 7SCCh. 12.2 - Prob. 8SCCh. 12.2 - Prob. 9SCCh. 12.2 - Prob. 10SC
Ch. 12.2 - Prob. 11SCCh. 12.2 - Prob. 12SCCh. 12.3 - Prob. 13SCCh. 12.3 - Prob. 14SCCh. 12 - Prob. 1RECh. 12 - Prob. 2RECh. 12 - Prob. 3RECh. 12 - Prob. 4RECh. 12 - Prob. 5RECh. 12 - Prob. 6RECh. 12 - Prob. 7RECh. 12 - Prob. 8RECh. 12 - Prob. 9RECh. 12 - Prob. 10RECh. 12 - Prob. 11RECh. 12 - Prob. 12RECh. 12 - Prob. 13RECh. 12 - Prob. 14RECh. 12 - Prob. 15RECh. 12 - Prob. 1PECh. 12 - Prob. 2PECh. 12 - Prob. 3PECh. 12 - Prob. 4PECh. 12 - Prob. 5PECh. 12 - Prob. 6PECh. 12 - Prob. 1PPCh. 12 - Prob. 2PPCh. 12 - Prob. 3PPCh. 12 - Prob. 4PPCh. 12 - Prob. 5PPCh. 12 - Prob. 6PPCh. 12 - Prob. 7PPCh. 12 - Prob. 8PPCh. 12 - Prob. 9PPCh. 12 - Prob. 10PP
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