使 JRadioButton 随机

Question

我的数据来自像这样对我的单选按钮的查询：

radio1.setText(Question.get(i).getChoiceOne()) // assign ist choice to ist radio button
radio2.setText(Question.get(i).getChoiceTwo()) // assign second choice to second radio
radio3.setText(Question.get(i).getcorrectchoice()) // assign correct choice to third radio button

在这种情况下，每次将正确答案分配给第三个单选按钮，这使得测验可预测。我可以以某种方式做到这一点，其中正确的选择有时分配给第一个单选，有时分配给第二个等等？

Answer 1

您可以执行以下操作：

String one = Question.get(i).getChoiceOne();
String two = Question.get(i).getChoiceTwo();
String three = Question.get(i).getcorrectchoice();

// construct list from questions.
List<String> choices = Arrays.asList(one, two, three);

// give random order to list
Collections.shuffle(choices);

// set radio button texts
radio1.setText(choices.get(0));
radio2.setText(choices.get(1));
radio3.setText(choices.get(2));

Answer 2

      int i = (Math.random() * 1000)%3;// generate a values between 0-2
      String[] answers = new String[3];
      answers[i] = Question.get(i).getcorrectchoice();// i is the index of right answer

      // insert the 2 other answers, what ever i you chose (i+1)%3 will put them in the remaining 2 places  
      answer[(i+1)%3] = Question.get(i).getfirstchoice(); 
      answer[(i+1)%3] = Question.get(i).getsecondchoice();
      i = (i+1)%3;// the original value of i
      // insert radios
      radio1.setText(answers[0]);
      radio2.setText(answers[1]);
      radio3.setText(answers[2]);

      //  get the right answer; get the text of the selected radio 
      if(textOfselectedRadio.quals(answers[i])){
      // correct 
      }