将问题数组放入文件中

Question

我不确定如何开始这个，希望得到一些想法，可以帮助我。

我的代码示例：

//Set question and answers.
            questions[0] = new P3A2_Harvey_4251833_Question("JVM stands for what?", "D");
            questions[0].setChoice("A. Java Variable Machine");
            questions[0].setChoice("B. Java Variable Method");
            questions[0].setChoice("C. Java Virtual Method");
            questions[0].setChoice("D. Java Virtual Machine");
            questions[1] = new P3A2_Harvey_4251833_Question("Every complete programming statement ends with what?", "A");
            questions[1].setChoice("A. Semicolon");
            questions[1].setChoice("B. Period");
            questions[1].setChoice("C. Colon");
            questions[1].setChoice("D. Question Mark");
            questions[2] = new P3A2_Harvey_4251833_Question("This type of expression can be either true or false", "C");
            questions[2].setChoice("A. Null Expression");
            questions[2].setChoice("B. Binary Expression");
            questions[2].setChoice("C. Boolean Expression");
            questions[2].setChoice("D. Method Expressions");
            for(int i = 0; i<questions.length;i++)
            {
                //Randomizing the questions in the array. 
                int n = rand.nextInt(3);
                System.out.print("Question " + (n+1)+":");
                System.out.println(questions[n].getQuestion());
                System.out.println(questions[n].getChoice());
                System.out.print("Enter your answer: "); 
                userInput = keyboard.nextLine();
                //Asking for users input reference to the question. 
                while(!userInput.equals("A")&&!userInput.equals("B")&&!userInput.equals("C")&&!userInput.equals("D"))
                {
                    System.out.println("invalid response");
                    System.out.print("Enter your answer: ");
                    userInput = keyboard.nextLine();

Answer 1

我认为你已经非常接近你的解决方案了。这里有个建议。

由于您已经成功创建了Question类，您可以为该类编写一个额外的方法，该方法负责将问题的内容写入给定的文件。大概是这样的：

public class Question {
    //...

    public void write (PrintWriter out) {
        //TODO write your desired output
        out.println("This line will be written to whatever is given as parameter");
    }
}

然后，您可以创建一个文件，并将每个问题写入其中。例如，如果您有一个q，它将写入名为filename.txt的文件：

Question q = new Question(...);

PrintWriter writer = new PrintWriter("filename.txt");

q.write(writer); //Give the PrintWriter to the write method of Question class

writer.close();