***NETBEANS JAVA 2

Consider the following UML diagram and use it to create all classes (the driver, Midterm2019.java is given below with a sample run). Note: InterfaceQuestion is an Interface, Question is a class that accepts a String as answer to a question, ChoiceQuestion is a multiple-choice question with only one answer, MultiChoiceQuestion allows for multiple answers, and NumericQuestion allows for numeric answers with error tolerance of 0.01.

Here is the code for the InterfaceQuestion:

package Midterm;

public interface InterfaceQuestion

{

public abstract void setText(String questionText);

public abstract void setAnswer(String correctResponse);

public abstract String getName();

}

package Midterm;

import java.util.Scanner;

/* A quiz consists of questions, and there are different kinds of questions:

Fill-in-the-blank

Choice (single or multiple)

Numeric (where an approximate answer is ok; e.g., 1.33 when the actual answer is 4/3)

Free response */

public class Midterm2019

{

private static final byte NUMBER_QUESTIONS = 5;

public static void main(String[] args)

{

InterfaceQuestion[] quest = new InterfaceQuestion[NUMBER_QUESTIONS];

Question question = new Question();

Scanner keyboard = new Scanner(System.in);

question.setText("Who was the inventor of Java?");

question.setAnswer("James Gosling");

ChoiceQuestion first = new ChoiceQuestion();

first.setText("What was the original name of the Java language?");

first.addChoice("*7", false); first.addChoice("Duke", false);

first.addChoice("Oak", true);

first.addChoice("Gosling", false);

ChoiceQuestion second = new ChoiceQuestion();

second.setText("In which country was the inventor of Java born?");

second.addChoice("Australia", false);

second.addChoice("Canada", true);

second.addChoice("Denmark", false);

second.addChoice("United States", false);

MultiChoiceQuestion third = new MultiChoiceQuestion();

third.setText("Suppose A is an abstract class, B is a concrete " +

"subclass of A, and both A and B have a no-arg constructor. " + "Which of the following is correct?");

third.addChoice("A a = new A();", false);

third.addChoice("A a = new B();", true);

third.addChoice("B b = new A();", false);

third.addChoice("B b = new B();", true);

MultiChoiceQuestion fourth = new MultiChoiceQuestion();

fourth.setText("Which of the following are incorrect?");

fourth.addChoice("An abstract class contains constructors.", false);

fourth.addChoice("The constructors in an abstract class should be protected.", false);

fourth.addChoice("The constructors in an abstract class are private.", true);

fourth.addChoice("You may declare a final abstract class.", true);

fourth.addChoice("An interface may contain constructors.", true);

quest[0] = question;

quest[1] = first;

quest[2] = second;

quest[3] = third;

quest[4] = fourth;

for(int i = 0; i

presentQuestion((Question)quest[i]);

}

public static void presentQuestion(Question quest)

{

quest.display();

System.out.print("Your answer: ");

Scanner in = new Scanner(System.in);

String response = in.nextLine();

System.out.println(quest.checkAnswer(response) + " ");

}

}

run:

Who was the inventor of Java?

Your answer: James Gosling

true

What was the original name of the Java language?

1: *7

2: Duke

3: Oak

4: Gosling

Your answer: 3

true

In which country was the inventor of Java born?

1: Australia

2: Canada

3: Denmark

4: United States

Your answer: 2

true

Suppose A is an abstract class, B is a concrete subclass of A, and both A and B have a no-arg constructor. Which of the following is correct?

1: A a = new A();

2: A a = new B();

3: B b = new A();

4: B b = new B();

There are several correct answers, list all of them separated by spaces.

Your answer: 2 4

true

Which of the following are incorrect?

1: An abstract class contains constructors.

2: The constructors in an abstract class should be protected.

3: The constructors in an abstract class are private.

4: You may declare a final abstract class.

5: An interface may contain constructors.

There are several correct answers, list all of them separated by spaces.

Your answer: 3 4 5

true

BUILD SUCCESSFUL (total time: 17 seconds)

***NETBEANS JAVA 2

Midterm2019 InterfaceQuestion NUMBER QUESTIONS byte 5 + main args:String vo +presentQuestion(quest Question) void Question text String - answer String + Question + setText questionText: String) void + setAnswer(correctResponse: String): void + checkAnswer(response String): boolean display0:void getNameO:String ChoiceQuestion + ChoiceQuestion +addChoice(choice:String, correct: boolean): void + display0 void +getName0 String MultiChoiceQuestion NumericQuestion +MultiChoiceQuestion - answer double setAnswer(correctResponse: String) void + checkAnswer(response: String): boolean + display0 void +getName0 String + setAnswer(correctResponse double) void +checkAnswerresponse String): boolean +getName0 String Here is the code for the InterfaceQuestion: package Midterm; public interface InterfaceQuestion public abstract void setText(String questionText) public abstract void setAnswer(String correctResponse); public abstract String getName Midterm2019 InterfaceQuestion NUMBER QUESTIONS byte 5 + main args:String vo +presentQuestion(quest Question) void Question text String - answer String + Question + setText questionText: String) void + setAnswer(correctResponse: String): void + checkAnswer(response String): boolean display0:void getNameO:String ChoiceQuestion + ChoiceQuestion +addChoice(choice:String, correct: boolean): void + display0 void +getName0 String MultiChoiceQuestion NumericQuestion +MultiChoiceQuestion - answer double setAnswer(correctResponse: String) void + checkAnswer(response: String): boolean + display0 void +getName0 String + setAnswer(correctResponse double) void +checkAnswerresponse String): boolean +getName0 String Here is the code for the InterfaceQuestion: package Midterm; public interface InterfaceQuestion public abstract void setText(String questionText) public abstract void setAnswer(String correctResponse); public abstract String getName