Problem Please provide all the steps and comments in the co

Problem ( Please provide all the steps and comments in the code )

(a) Modify the checkAnswer method of the Question class discussed in class so that it
does not take into account different spaces or upper/lowercase characters. For example, the
response \"JAMES gosling\" should match an answer of \"James Gosling\".

(b) Add a class NumericQuestion to the Question hierarchy discussed in class. If the
response and the expected answer differ by no more than 0.01, then accept the response as
correct.

(c) Add a class FillInQuestion to the Question hierarchy discussed in class. Such a
question is constructed with a string that contains the answer, surrounded by _ _, for
example, “The father of the Java programming language was born in _Canada_.”. The
question should be displayed as

The father of the Java programming language was born in ________.

Solution

(a) The program for the above is:

public class CheckAnswer {

public class Question {

private String text;

private String answer;

public Question() {

text = \"\";    // Here we are entering the text//

answer = \"\";

}

public void setText(String questionText) {

text = questionText;

}

public void setAnswer(String correctResponse) {

answer = correctResponse;

}

public boolean checkAnswer(String response) {

return response.toLowerCase().equals(answer.toLowerCase());

}

public void display() {

System.out.println(text);

}

}

}

(b)

public class NumericQuestion extends Question {

private double answer;

public void setAnswer(double correctResponse) {

answer = correctResponse;

}

public boolean checkAnswer(String response)

{

double responseDouble = Double.parseDouble(response);

return Math.abs(responseDouble - answer) <= 0.01;

}

}

(c)

public class FillInQuestion extends Question {

public void setText(String questionText) {

Scanner parser = new Scanner(questionText);

parser.useDelimiter(\"_\");

String question = parser.next();

String answer = parser.next();

question += \"       \" + parser.next();

parser.close();

super.setText(question);

super.setAnswer(answer);

}

}