Question

Create a Flash Card class. Flash Cards have a Question and an Answer, each of which are Strings. Your class should include a constructor, toString() and equals() methods. Write a main() method that creates an array of three Flash Cards, and prints each of them.

Answer 1

Answer:

FlashCard.java

1. public class FlashCard {
2.    String Question;
3.    String Answer;
5.    public FlashCard(String q, String a){
6.        this.Question = q;
7.        this.Answer = a;
8.    }
10.    public String toString(){
11.        String output = "";
12.        output += "Question: " + this.Question + "\n";
13.        output += "Answer: " + this.Answer;
14.        return output;
15.    }
17.    public boolean equals(String response){
18.        if(this.Answer.equals(response)){
19.            return true;
20.        }
21.        else{
22.            return false;
23.        }
24.    }
25. }

Main.java

1. public class Main {
2.    public static void main(String[] args) {
3.        FlashCard card1 = new FlashCard("What is highest mountain?", "Everest");
4.        FlashCard card2 = new FlashCard("What is natural satelite of earth?", "Moon");
5.        FlashCard card3 = new FlashCard("Who is the first president of US?", "George Washington");
6.        FlashCard cards [] = {card1, card2, card3};
8.        for(int i=0; i < cards.length; i++){
9.            System.out.println(cards[i]);
10.        }
11.    }
12. }

Explanation:

In FlashCard.java, we create a FlashCard class with two instance variable, Question and Answer (Line 2 - 3). There is a constructor that takes two input strings to initialize the Question and Answer instance variables (Line 5-8). There is also a toString method that will return the predefined output string of question answer (Line 10 - 15). And also another equals method that will take an input string and check against with the Answer using string equals method. If matched, return True (Line 17 -24).

In Main.java, create three FlashCard object (Line 3-5) and then put them into an array (Line 6). Use a for loop to print the object (Line 8-10). The sample output is as follows:

Question: What is highest mountain?

Answer: Everest

Question: What is natural satelite of earth?

Answer: Moon

Question: Who is the first president of US?

Answer: George Washington