Question

Exercise #3:

Create the “MathTest” class. It will have two class variables: 1) a question and 2) the answer to that question.

Exercise #4:

Please create an accessor and mutator method for both of those variables, without which we would not be able to see or change the question or the answer.

Exercise #5:

There should be a constructor method. We will also have a “ToString” method, which will print the question followed by its answer.

The constructor method has two parameters to allow the user to enter a question and answer, or if no input/parameters are given then a default question and answer should be supplied (see exercise 4 for the default question and answer).

Exercise #6:

The last method of the class, CheckAnswer, should take in a string as a parameter and compare it to the answer. If the input was incorrect, it should return false. Otherwise, it should return true.

Exercise #7:

Create an instance of the “MathTest” class in your “main” method. First ask the user if they want to enter a question and answer.

Exercise #3:

Create the “MathTest” class. It will have two class variables: 1) a question and 2) the answer to that question.

Exercise #4:

Please create an accessor and mutator method for both of those variables, without which we would not be able to see or change the question or the answer.

Exercise #5:

There should be a constructor method. We will also have a “ToString” method, which will print the question followed by its answer.

The constructor method has two parameters to allow the user to enter a question and answer, or if no input/parameters are given then a default question and answer should be supplied (see exercise 4 for the default question and answer).

Exercise #6:

The last method of the class, CheckAnswer, should take in a string as a parameter and compare it to the answer. If the input was incorrect, it should return false. Otherwise, it should return true.

Exercise #7:

Create an instance of the “MathTest” class in your “main” method. First ask the user if they want to enter a question and answer.

Answer 1

I have implemented the question in java. You were not clear about what to be done in the main function. As per your requirement, I created the instance of the class and asked the user for input for the instance of to proceed the default values. If you need any changes please comment.

The code is:

import java.util.Scanner;
public class MathTest {
   //declaring the variables
   private String question;
   private String answer;
   //Mutator methods
   public void setQuestion(String q){
       question=q;
   }
   public void setAnswer(String a){
       answer=a;
   }
   //Accessor methods
   public String getQuestion(){
       return question;
   }
   public String getAnswer(){
       return answer;
   }
   //constructor with no arguments
   MathTest(){
       this.question="DefaultQuestion";
       this.answer="DefaultAnswer";
   }
   //constructor with arguments
   MathTest(String q, String a){
       this.question=q;
       this.answer=a;
   }
   // the ToString function
   public void ToString(){
       System.out.println(this.question + " " + this.answer);
   }
   // the checkanswer function
   public boolean CheckAnswer(String ans){
       if(ans.equals(this.answer))
           return true; //returns true if the answers match
       return false;
   }
   public static void main(String[] args) {
       MathTest mt; //instance creation
       Scanner s = new Scanner(System.in);
       int x; //To take input from user
       System.out.println("Enter 1 if you want to enter question and answer");
       System.out.println("Enter 2 if you want to continue with default values");
       x=s.nextInt();
       if(x==1 || x==2){//if enter one or two
           if(x==1){
               System.out.println("Enter the value for question");
               String ques = s.next();
               System.out.println("Enter the value for answer");
               String ans = s.next();
               mt = new MathTest(ques,ans);//taking input and calling parameterized constructor
           }
           else{
               mt = new MathTest();//calling non-parameterized constructor
           }
           System.out.println("Enter a string to check answer");
           String val=s.next();
           boolean comp = mt.CheckAnswer(val); //to check the checkanswer function
           System.out.println(comp);
           System.out.println("The ToString Function is : ");
           mt.ToString();// the ToString function
       }
       else // if no option is selected
           System.out.println("You did not select any");
      
   }

}
OUTPUT: