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トップJavaに関する質問二択問題の作り方について質問です。

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回答編集履歴

3

コード修正

2017/08/17 00:04

投稿

LouiS0616
LouiS0616

スコア35660

test CHANGED
@@ -148,13 +148,15 @@
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+ AnswerChecker answerChecker = new AnswerChecker(question);
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+
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  for(String answer: question.getAnswerList()) {
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  JButton button = new JButton(answer);
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  questionCard.add(button);
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- button.addActionListener(new AnswerChecker(question));
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+ button.addActionListener(answerChecker);
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  }
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2

追記

2017/08/17 00:03

投稿

LouiS0616
LouiS0616

スコア35660

test CHANGED
@@ -309,3 +309,7 @@
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  }
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  ```
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+
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+
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+
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+ 構造は突貫ですし、命名はいい加減です。参考程度にお願いします。

1

追記

2017/08/16 14:27

投稿

LouiS0616
LouiS0616

スコア35660

test CHANGED
@@ -13,3 +13,299 @@
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  配列にすることで、似たような処理を簡潔に書くことができます。
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  また、答えも配列で管理するようにすれば、問題を追加したときも柔軟に対応できるでしょう。
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+
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+ (私の例では独自クラスの配列としています)
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+
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+
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+
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+ ---
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+
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+ 適当ですが、作ってみました。
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+
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+ ```Java
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+
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+ public class Question {
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+
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+ private String question;
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+
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+ private String[] answerList;
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+
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+ private int answerNum;
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+
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+ private String comment;
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+
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+
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+
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+ public Question(String question, String[] answerList, int answerNum, String comment) {
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+
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+ this.question = question;
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+
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+ this.answerList = answerList;
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+
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+ this.answerNum = answerNum;
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+
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+ this.comment = comment;
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+
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+ }
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+
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+
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+
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+ public String getQuestion() {
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+
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+ return question;
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+
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+ }
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+
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+ public String[] getAnswerList() {
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+
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+ return answerList;
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+
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+ }
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+
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+ public String getComment() {
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+
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+ return comment;
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+
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+ }
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+
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+
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+
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+ public boolean isCorrect(String answer) {
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+
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+ return answer.equals(answerList[answerNum]);
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+
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+ }
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+
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+ }
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+
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+ ```
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+
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+
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+
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+ ```Java
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+
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+ import javax.swing.*;
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+
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+ import java.awt.CardLayout;
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+
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+ import java.awt.BorderLayout;
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+
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+ import java.awt.event.*;
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+
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+
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+
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+ public class Sample extends JFrame{
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+
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+ private int correctedNum = 0;
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+
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+ private int answeredNum = 0;
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+
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+
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+
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+ private final Question[] questions = {
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+ new Question("質問1", new String[]{"選択肢1", "選択肢2"}, 0, "解説1"),
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+
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+ new Question("質問2", new String[]{"選択肢3", "選択肢4"}, 1, "解説2"),
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+
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+ new Question("質問3", new String[]{"選択肢5", "選択肢6"}, 0, "解説3"),
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+
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+ };
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+
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+
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+
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+ public static void main(String[] args){
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+
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+ new Sample("タイトル");
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+
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+ }
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+
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+
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+
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+ private Sample(String title){
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+
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+ super(title);
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+
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+
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+
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+ //
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+
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+ // CardPanel
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+
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+ JPanel cardPanel = new JPanel();
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+ CardLayout layout = new CardLayout();
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+
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+ cardPanel.setLayout(layout);
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+
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+
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+
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+ for(Question question: questions) {
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+
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+ JPanel questionCard = new JPanel();
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+
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+ questionCard.add(new JLabel(question.getQuestion()));
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+
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+
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+
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+ for(String answer: question.getAnswerList()) {
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+
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+ JButton button = new JButton(answer);
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+
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+ questionCard.add(button);
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+
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+ button.addActionListener(new AnswerChecker(question));
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+
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+ }
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+
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+
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+
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+ cardPanel.add(questionCard);
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+
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+ }
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+
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+ getContentPane().add(cardPanel, BorderLayout.CENTER);
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+
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+ QuestionChooser questionChooser = new QuestionChooser(layout, cardPanel);
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+
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+
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+
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+ //
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+
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+ // CtrlPanel
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+ JPanel ctrlPanel = new JPanel();
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+
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+
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+
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+ JButton prevButton = new JButton("前へ");
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+
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+ prevButton.addActionListener(questionChooser);
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+
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+ prevButton.setActionCommand("previous");
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+
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+
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+
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+ JButton nextButton = new JButton("次へ");
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+
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+ nextButton.addActionListener(questionChooser);
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+
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+ nextButton.setActionCommand("next");
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+
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+
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+
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+ ctrlPanel.add(prevButton);
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+
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+ ctrlPanel.add(nextButton);
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+
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+
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+
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+ //
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+
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+ // FrameLayout
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+
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+ add(ctrlPanel, BorderLayout.PAGE_END);
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+
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+
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+
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+ setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
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+
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+ setBounds(10, 10, 300, 200);
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+
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+ setVisible(true);
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+
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+ }
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+
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+
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+
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+ private class QuestionChooser implements ActionListener {
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+
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+ private CardLayout layout;
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+
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+ private JPanel panel;
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+
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+
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+
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+ QuestionChooser(CardLayout layout, JPanel panel) {
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+
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+ this.layout = layout;
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+
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+ this.panel = panel;
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+
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+ }
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+
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+
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+
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+ public void actionPerformed(ActionEvent e) {
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+
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+ String cmd = e.getActionCommand();
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+
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+
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+
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+ if( cmd.equals("next") ) {
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+
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+ layout.next(panel);
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+
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+ }
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+
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+ else if( cmd.equals("previous")) {
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+
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+ layout.previous(panel);
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+
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+ }
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+
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+ }
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+
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+ }
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+
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+
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+
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+ private class AnswerChecker implements ActionListener {
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+
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+ private Question question;
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+
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+
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+
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+ AnswerChecker(Question question) {
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+
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+ this.question = question;
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+
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+ }
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+
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+
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+
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+ public void actionPerformed(ActionEvent e) {
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+
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+ ++answeredNum;
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+
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+
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+
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+ String selectedAnswer = ((JButton)e.getSource()).getText();
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+
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+ if(question.isCorrect(selectedAnswer)) {
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+
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+ ++correctedNum;
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+
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+ }
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+
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+
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+
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+ String comment = question.getComment() + "正答数は" + correctedNum + "/" + answeredNum + "です";
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+
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+ showMessage(comment);
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+
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+ }
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+
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+
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+
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+ private void showMessage(String str) {
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+
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+ JOptionPane.showMessageDialog(null, new JLabel(str));
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+
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+ }
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+
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+ }
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+
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+ }
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+
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+ ```