在swing中获取选定的单选按钮列表
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【中文标题】在swing中获取选定的单选按钮列表【英文标题】：get selected radio button list in swing 【发布时间】：2013-09-10 04:03:18 【问题描述】：我将使用 java swing 创建多项选择题应用程序。我在单独的 jPanel 中创建了带有单选按钮列表的 swing 类。我需要找到选定的单选按钮并在提交按钮时在正确答案上突出显示。但我无法在摇摆中获得选定的单选按钮列表。谁能给我一个好的解决方案？
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();
【问题讨论】：
创建问题的模型，UI 可以创建该模型的视图。允许视图将选定的答案设置回模型... 请问什么逻辑？？？问题是随机显示的，你之前的选择存储在哪里？？？仅在 JLabel 中，getCorrectAnswer 是硬编码的？？？ 我已经在 QuestionPane 类中创建了 QuestionUI，我在这里使用它的对象 如需尽快获得更好的帮助，请发帖SSCCE。 是的，问题和答案是随机显示的，不是，getCorrectAnswer() 是 Question pojo 中的 getter，它存储了正确的答案。我使用单独的 Answer dto 将true 设置为正确答案并将其存储为 setHideActionText()
【参考方案1】：
创建一个能够引用Question 模型的QuestionAnswerPane
此面板将负责生成由Question 模型表示的视图并将用户的响应存储在其中。
QuestionAnswerPane 应该知道JRadioButton 属于哪个answer。当用户选择其中一个单选按钮时，它将使用用户选择的答案更新Question 模型。
当用户点击Submit 时，您只需查找每个Question 并检索用户选择的答案。
它还将模型与 UI 分离，使其更易于处理。有了这个想法，您实际上可以检查所有问题是否都已得到回答。这也可以通过在模型中添加 ChangeListener 之类的东西来实现
更新了 BASIC 示例
这只是一个示例，旨在展示Question 是集中控制器/模型的概念
根据上面的屏幕截图，输出...
香蕉的颜色？ 你的回答是：黄色 正确答案是：黄色 你说的对 生命的终极问题是宇宙和万物？ 你的回答是：巧克力 正确答案是：42 您错了 你爸爸是谁？ 你的回答是：R2D2 正确答案是：达斯·瓦达 您错了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();
【讨论】：
您的意思是使用Question 模型将所有属性设置为QuestionAnswerPane，在迭代QuestionAnswerPane 并显示问题之后？单击提交按钮时，getSelectedValue 出现问题
没有。我的意思是，允许QuestionAnswerPane 将“从用户那里选择答案”设置回Question 模型，那么你就不用关心 UI 处于什么状态了...
我添加了我正在谈论的概念。您应该能够看到 Question 是关键，它包含确定问题所要求的内容和用户选择的内容所需的所有信息，所有这些都不以任何方式依赖 UI...我不关心答案的来源或格式...
感谢您的指导。
我必须用问题显示正确答案，所以你能给我一个小主意，在QuestionPane 中标记正确答案（突出显示单选按钮文本）。主要问题是我无法在 ui 中专门选择提取问题。以上是关于在swing中获取选定的单选按钮列表的主要内容，如果未能解决你的问题，请参考以下文章