獲得選定的單選按鈕列表

Question

我將使用java swing創建多選題問題應用程序。我在單獨的jPanel中創建了帶有單選按鈕列表的swing類。我需要找到所選的單選按鈕，並在提交按鈕時突出顯示正確答案。 但我無法擺動所選的單選按鈕列表。 誰能建議我一個好的解決方案？

private void myInitComponents() {

    jLabel = new javax.swing.JLabel();
    setLayout(new BorderLayout());
    jButton1 = new javax.swing.JButton();

    QuestionDaoIF questionDao = new QuestionDao();

    List<Question> listOfQuestion = questionDao.getQuestion();
    jPanel2 = new javax.swing.JPanel();
    jPanel2.setLayout(new BoxLayout(jPanel2, BoxLayout.Y_AXIS));
    JScrollBar vbar = new JScrollBar(JScrollBar.VERTICAL, 30, 100, 0, 300);
    vbar.addAdjustmentListener(new MyAdjustmentListener());


    add(jLabel, BorderLayout.CENTER);
    jPanel2.setAutoscrolls(true);
    List<String> answerList = new ArrayList<>();
    List<Question> questionList = listOfQuestion ;
    Collections.shuffle(questionList);

    int i = 1;
    for (Question question : questionList) {

        QuestionPane pane = new QuestionPane();
        pane.getjTextPane1().setText("("+i+")  "+question.getQuestion());
        //genarate random answers
        genarateRandomAnswer(question, answerList, pane);

        jPanel2.add(pane);
        i++;
    }
    jButton1.setText("Submit");
    jButton1.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            jButton1ActionPerformed(evt);
        }
    });

    jPanel2.add(jButton1);
    //jPanel2.setBounds(100, 100, 800, 700);
    this.add(getJMainScrollPane());
    this.setTitle("Quizz");
    this.setSize(1000, 700);
    //pack();

}

    private JScrollPane getJMainScrollPane() {
    JScrollPane jMainScrollPane = new JScrollPane(jPanel2);
    jMainScrollPane.setViewportBorder(BorderFactory
            .createLineBorder(Color.GREEN));
    jMainScrollPane
            .applyComponentOrientation(ComponentOrientation.LEFT_TO_RIGHT);
    return jMainScrollPane;
}

private void genarateRandomAnswer(Question question, List<String> answerList, QuestionPane pane) {
    String answer1 = question.getCorrectAnswer();
    String answer2 = question.getWrongAnswer1();
    String answer3 = question.getWrongAnswer2();
    String answer4 = question.getWrongAnswer3();

    List<Answer> answrList = new ArrayList<>();

    Answer ans1 = new Answer();
    ans1.setAnswer(answer1);
    ans1.setCorrectAnswer(true);

    Answer ans2 = new Answer();
    ans2.setAnswer(answer2);
    ans2.setCorrectAnswer(false);

    Answer ans3 = new Answer();
    ans3.setAnswer(answer3);
    ans3.setCorrectAnswer(false);

    Answer ans4 = new Answer();
    ans4.setAnswer(answer4);
    ans4.setCorrectAnswer(false);

    answrList.add(ans1);
    answrList.add(ans2);
    answrList.add(ans3);
    answrList.add(ans4);

    Collections.shuffle(answrList);
    buttonGroup1 = new javax.swing.ButtonGroup();
    buttonGroup1.add(pane.getjRadioButton1());
    buttonGroup1.add(pane.getjRadioButton2());
    buttonGroup1.add(pane.getjRadioButton3());
    buttonGroup1.add(pane.getjRadioButton4());

    pane.getjRadioButton1().setText("(a) "+answrList.get(0).getAnswer());
    pane.getjRadioButton1().setHideActionText(answrList.get(0).isCorrectAnswer());
    pane.getjRadioButton2().setText("(b) "+answrList.get(1).getAnswer());
    pane.getjRadioButton2().setHideActionText(answrList.get(1).isCorrectAnswer());
    pane.getjRadioButton3().setText("(c) "+answrList.get(2).getAnswer());
    pane.getjRadioButton3().setHideActionText(answrList.get(2).isCorrectAnswer());
    pane.getjRadioButton4().setText("(d) "+answrList.get(3).getAnswer());
    pane.getjRadioButton4().setHideActionText(answrList.get(3).isCorrectAnswer());  
}

class MyAdjustmentListener implements AdjustmentListener {

    @Override
    public void adjustmentValueChanged(AdjustmentEvent e) {
       jLabel.setText("    New Value is " + e.getValue() + "      ");
        repaint();
    }
}

Answer 1

創建一個QuestionAnswerPane ，它能夠引用Question模型

該面板將負責生成Question模型所代表的視圖並將用戶的響應存儲在其中。

QuestionAnswerPane應該知道JRadioButton屬於哪個answer 。 當用戶選擇其中一個單選按鈕時，它將使用用戶選擇的答案更新Question模型。

當用戶單擊“ Submit ，您只需查找每個Question並檢索用戶選擇的答案。

它還將模型與UI分離，使其更易於處理。 有了這個想法，您實際上可以檢查是否所有問題都得到了回答。 這也可以通過向模型添加類似ChangeListener來實現

更新了BASIC示例

這僅僅是旨在演示的概念的示例Question是集中控制器/模型

根據上面的屏幕截圖，輸出......

The color of a banana?
          Your answer was : Yellow
    The correct answer is : Yellow
                  You are : Right
The utimate question of life the universe and every thing?
          Your answer was : Choclate
    The correct answer is : 42
                  You are : Wrong
Who's your daddy?
          Your answer was : R2D2
    The correct answer is : Darth Vadar
                  You are : Wrong

import java.awt.BorderLayout;
import java.awt.EventQueue;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import javax.swing.AbstractAction;
import javax.swing.ButtonGroup;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.border.TitledBorder;

public class QuestionAnswer {

    public static void main(String[] args) {
        new QuestionAnswer();
    }

    public QuestionAnswer() {
        EventQueue.invokeLater(new Runnable() {
            @Override
            public void run() {
                try {
                    UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
                } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
                }

                JFrame frame = new JFrame("Testing");
                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                frame.setLayout(new BorderLayout());
                frame.add(new QuestionsPane());
                frame.pack();
                frame.setLocationRelativeTo(null);
                frame.setVisible(true);
            }
        });
    }

    public class QuestionsPane extends JPanel {

        public QuestionsPane() {

            setLayout(new GridBagLayout());
            GridBagConstraints gbc = new GridBagConstraints();
            gbc.gridwidth = GridBagConstraints.REMAINDER;
            gbc.anchor = GridBagConstraints.WEST;
            gbc.weightx = 1;
            gbc.fill = GridBagConstraints.HORIZONTAL;

            final List<Question> questions = new ArrayList<>(3);
            questions.add(new Question("The color of a banana?", 
                            new Answer("Yellow"),
                            new Answer("Pink"),
                            new Answer("Blue"),
                            new Answer("Orange")
                    ));
            questions.add(new Question("The utimate question of life the universe and every thing?", 
                            new Answer("42"),
                            new Answer("Sleep"),
                            new Answer("Choclate"),
                            new Answer("1024"),
                            new Answer("Microsoft"),
                            new Answer("Apple")
                    ));
            questions.add(new Question("Who's your daddy?", 
                            new Answer("Darth Vadar"),
                            new Answer("Anikin Skywalker"),
                            new Answer("Yoda"),
                            new Answer("Mace Windo"),
                            new Answer("Chewbacca"),
                            new Answer("R2D2")
                    ));

            for (Question q : questions) {

                add(new QuestionAnswerPane(q), gbc);

            }

            gbc.weighty = 1;
            add(new JPanel(), gbc);
            gbc.weighty = 0;
            gbc.fill = GridBagConstraints.NONE;
            gbc.anchor = GridBagConstraints.CENTER;

            JButton submit = new JButton("Submit");
            submit.addActionListener(new ActionListener() {
                @Override
                public void actionPerformed(ActionEvent e) {
                    for (Question q : questions) {
                        System.out.println(q.getText());
                        System.out.println("\t      Your answer was : " + q.getSelectedAnswer());
                        System.out.println("\tThe correct answer is : " + q.getCorrectAnswer());
                        System.out.println("\t              You are : " + (q.isCorrectAnswer() ? "Right" : "Wrong"));
                    }
                }
            });

            add(submit, gbc);

        }

    }

    public class QuestionAnswerPane extends JPanel {

        public QuestionAnswerPane(Question question) {

            List<Answer> answers = new ArrayList<>(question.getWrongAnswers());
            answers.add(question.getCorrectAnswer());

            Collections.shuffle(answers);

            setBorder(new TitledBorder(question.getText()));
            setLayout(new GridBagLayout());
            GridBagConstraints gbc = new GridBagConstraints();
            gbc.gridwidth = GridBagConstraints.REMAINDER;
            gbc.anchor = GridBagConstraints.WEST;
            gbc.weightx = 1;
            gbc.fill = GridBagConstraints.HORIZONTAL;

            ButtonGroup bg = new ButtonGroup();
            for (Answer answer : answers) {

                JRadioButton rb = new JRadioButton(new AnswerAction(question, answer));
                bg.add(rb);
                add(rb, gbc);

            }
            gbc.weighty = 1;
            add(new JPanel(), gbc);

        }

    }

    public class AnswerAction extends AbstractAction {

        private final Question question;
        private final Answer answer;

        public AnswerAction(Question question, Answer answer) {
            this.question = question;
            this.answer = answer;
            putValue(NAME, answer.getText());
        }

        public Answer getAnswer() {
            return answer;
        }

        public Question getQuestion() {
            return question;
        }

        @Override
        public void actionPerformed(ActionEvent e) {
            getQuestion().setSelectedAnswer(answer);
        }

    }

    public class Question {

        private Answer correctAnswer;
        private List<Answer> wrongAnswers;
        private Answer selectedAnswer;

        private String text;

        public Question(String text, Answer correct, Answer... wrong) {
            wrongAnswers = new ArrayList<>(Arrays.asList(wrong));
            correctAnswer = correct;
            this.text = text;
        }

        public String getText() {
            return text;
        }

        public Answer getCorrectAnswer() {
            return correctAnswer;
        }

        public List<Answer> getWrongAnswers() {
            return Collections.unmodifiableList(wrongAnswers);
        }

        public Answer getSelectedAnswer() {
            return selectedAnswer;
        }

        public void setSelectedAnswer(Answer selectedAnswer) {
            this.selectedAnswer = selectedAnswer;
        }

        public boolean isCorrectAnswer() {
            Answer answer = getSelectedAnswer();
            Answer correct = getCorrectAnswer();
            return correct.equals(answer);
        }

        @Override
        public String toString() {
            return getText();
        }

    }

    public class Answer {

        private String text;

        public Answer(String text) {
            this.text = text;
        }

        public String getText() {
            return text;
        }

        @Override
        public String toString() {
            return getText();
        }

    }

}