简单问卷阵列程序

Question

I want to create a simple questionnaire program - there will be five questions and 4 answers each. Everything time it is run the questions and answers order will be random.

Ex:

1st run:

1. What is fruit colored red? a. Apple b.Pineapple c. Orange d. Pear

2. What shape has 3 sides? a. Square b. Circle c. Triangle d. octagon

2nd run:

1. What shape has 3 sides? a. Octagon b. Square c. Circle d. Triangle
2. What is fruit colored red? a. Orange b. Apple c. Pear d. Pineapple

--EDIT-- Here is the draft code I have made based on the suggestions:

public static void main(String[] args) {
    Scanner input = new Scanner (System.in);
    Random rand = new Random();

    ArrayList<ArrayList<String>> arrList = new ArrayList<ArrayList<String>>();
    ArrayList<String> question = new ArrayList<String>();
    ArrayList<String> choiceShuffle = new ArrayList<String>();
    ArrayList<String> choice1 = new ArrayList<String>();
    ArrayList<String> choice2 = new ArrayList<String>();
    ArrayList<String> choice3 = new ArrayList<String>();

    int numQuestion = 3;
    int randomNum = rand.nextInt(numQuestion);
    int score = 0;
    String questionShuffle;
    questionShuffle = question.get(randomNum);
    choiceShuffle = arrList.get(randomNum);

    question.add("What is after a?");
    question.add("What is after b?");
    question.add("What is after c?");

    choice1.add("a"); choice1.add("b"); choice1.add("c");
    choice2.add("d"); choice2.add("c"); choice2.add("e");
    choice3.add("d"); choice3.add("a"); choice3.add("b");

    arrList.add(choice1);
    arrList.add(choice2);
    arrList.add(choice3);

    for (int x = 1; x <= question.size(); x++){
        System.out.print(question.get(randomNum));
        Collections.shuffle(choiceShuffle);
        System.out.println(choiceShuffle);
    }
}

}

Where am I going wrong here? and also I would like to create a variable named "score" that whenever the right answer is chosen, it will initiate score++. Open for suggestions.

Answer 1

you can use the Random class available in Java for random number generation.

 Random rand = new Random(); int randomNum = rand.nextInt((max - min) + 1) + min; 

here max will be your number of questions and in your particular case you can set min to 0, you can use Swing classes to design your GUI. Most IDEs like NetBeans/Eclipse have provisions to create GUI without writing explicit code. Now depending on your random number you can access the question[rand] . You can implement your questions and answers as arraylists and access your questions as question[rand]. You can shuffle your corresponding answers list using

Collections.shuffle(answerList);

Edit: Here's a sample code for your reference:

import java.util.ArrayList; import java.util.Iterator; import java.util.Random; import java.util.Collections;

public class JavaApplication1 {

 public static void main(String[] args) { /** * Create ArrayList in ArrayList Object */ ArrayList<ArrayList<String>> quesAns = new ArrayList<ArrayList<String>>(); ArrayList<String> answer = new ArrayList<String>(); ArrayList<String> question = new ArrayList<String>(); question.add("what's your fruit?"); question.add("what's your shape?"); answer.add("apple"); answer.add("banana"); answer.add("mango"); quesAns.add(answer); ArrayList<String> answer2 = new ArrayList<String>(); answer2.add("circle"); answer2.add("rectangle"); quesAns.add(answer2); Random rand = new Random(); numQues = 2 int randomNum = rand.nextInt(numQues); System.out.println (question.get(randomNum)); ArrayList<String> answerListShuffle = new ArrayList<String>(); answerListShuffle = quesAns.get(randomNum); Collections.shuffle(answerListShuffle); System.out.println(answerListShuffle); } 

}

This is just an example implementation. You can make up these arrayllists and add elements as you go inside your loops depending on the number of elements

Answer 2

It's better to use HashMap. because with HashMap you can map your answer object & question object together. I think it's easy for you.