java - GUI JButton，如何将按钮(问题)分配给答案

Question

好吧，所以我只需要一个简单的答案/提示/建议，或者如果你们愿意修复我的 java GUI 代码。

所以基本上我的问题是在这个游戏中，当用户回答我的一个问题时，他/她可以答对，但是，有一个主要缺陷，用户可以使用我的任何问题的任何答案来获得对的。

我就是这样做的，但我不知道如何以其他方式做到这一点!我对此做了一些研究，但在谷歌上找不到任何东西，因为我什至不知道如何表达这个问题，所以我来到这样的论坛，希望得到一些提示或答案。

不，我不希望任何人改变任何事情，只是寻找一些答案来了解该怎么做!

代码:

public void init () //method name init
 {
    Container pane = getContentPane();
    pane.setLayout (new GridLayout (6,0));

    //set component fonts
    Font titleFont = new Font ("TimesRoman", Font.BOLD, 35);
    Font otherFont = new Font ("TimesRoman", Font.BOLD, 35);

    //gives a title for program
    lblTitle = new JLabel ("GEOGRAPHY JEOPARDY", JLabel.CENTER);
    lblTitle.setFont (titleFont);

    //use color constant to set colour
    lblTitle.setForeground (Color.blue);
    lblTitle.setLocation (0,0);

    //makes the intro empty for now
    lblIntro = new JLabel ("");
    //gives the label a font
    lblIntro.setFont (otherFont);

    //the buttons are initialized and contains strings to be compared in action listener
    btn1 = new JButton ("Question 1, 100 points");
    btn2 = new JButton ("Question 2, 200 points");
    btn3 = new JButton ("Question 3, 300 points");
    btn4 = new JButton ("Question 4, 400 points");
    btn5 = new JButton ("Question 5, 500 points");
    btnCheck = new JButton ("Check answer");


    //sets the text to nothing
    txtInput = new JTextField ("", JTextField.CENTER);
    //gives the text in textbox a font
    txtInput.setFont (otherFont);


    //add actionListener to buttons
    btn1.addActionListener (this);
    btn2.addActionListener (this);
    btn3.addActionListener (this);
    btn4.addActionListener (this);
    btn5.addActionListener (this);
    btnCheck.addActionListener (this);

    //makes the label info empty
    lblInfo = new JLabel ("", JLabel.CENTER);

    //Split button into 2 seperate buttons
    panelButtons = new JPanel (new FlowLayout ());
    panelButtons.add (btn1);
    panelButtons.add (btn2);
    panelButtons.add (btn3);
    panelButtons.add (btn4);
    panelButtons.add (btn5);
    panelButtons.add (btnCheck);


    //the items to add on the panel
    pane.add (lblTitle);
    pane.add (lblIntro);
    pane.add (panelButtons);
    pane.add (lblInfo);
    pane.add (btn1);
    pane.add (btn2);
    pane.add (btn3);
    pane.add (btn4);
    pane.add (btn5);
    pane.add (btnCheck);
    pane.add (txtInput);



       }
      public void actionPerformed (ActionEvent event)
      {


    //which buttons are  being pressed
    String command = event.getActionCommand();
    //if statements regarding what happens when the buttons are clicked 
    if (command.equals("Question 1, 100 points"))
    {
      //set the text to blank
      btn1.setText("");
      //set the label with the question
      lblInfo.setText(q1);

    }
    //if this button is clicked...
    else if (command.equals("Question 2, 200 points"))
    {
      //set the text empty
      btn2.setText("");
      //display question 2
      lblInfo.setText(q2);
    }  
    //if this buttton is clicked...
    else if (command.equals("Question 3, 300 points"))
    {
      //empty text 
      btn3.setText("");
      //show question 3
      lblInfo.setText(q3);
    }
    else if (command.equals("Question 4, 400 points"))
    {
      //make button 4 text empty to indicate that it has been already picked
      btn4.setText("");
      //show question 4 in the label called info
      lblInfo.setText(q4);
    }
    //the action listener is lisening for this button to be clicked
    else if (command.equals("Question 5, 500 points"))
    {
      //make emtpy
      btn5.setText("");
      //display question 5
      lblInfo.setText(q5);
    }         
    else 
    {

    } 
    //listening for that button
    if (command.equals("Check answer"))
    {
      //the textfield is equal to the variable input
      input = txtInput.getText();
      //***THE PROBLEM***
      if (input.equals(a1)||input.equals(a2)||input.equals(a3)||input.equals(a4)||input.equals(a5))
      {
        //if the user input is equal to the answer do...
        if (input.equals(a1))
        {
          //say its correct
          lblIntro.setText("Corect!");
          //display it in green colour
          lblIntro.setForeground (Color.green);
          //give user 100 points
          points = points + 100;
          //display points
          lblTitle.setText("You have: " + points);
        }
        //if the user input is equal to the answer do...
        else if (input.equals(a2))
        {
          //say its correct
          lblIntro.setText("Corect!");
          //display it in green colour
          lblIntro.setForeground (Color.green);
          //give user points
          points = points + 200;
          //display the points on panel
          lblTitle.setText("You have: " + points);
        }
        //if the user input is equal to the answer do...
        else if (input.equals(a3))
        {
          //correct answer
          lblIntro.setText("Corect!");
          //set green colour-
          lblIntro.setForeground (Color.green);
          //give points for correct answer
          points = points + 300;
          //display those points
          lblTitle.setText("You have: " + points);
        }
        //if the user input is equal to the answer do...
        else if (input.equals(a4))
        {
          //say the user is correct
          lblIntro.setText("Corect!");
          //show it in green
          lblIntro.setForeground (Color.green);
          //give points for reward
          points = points + 400;
          //show on title
          lblTitle.setText("You have: " + points);
        }
        //if the user input is equal to the answer do...
        else if (input.equals(a5))
        {
          //say he or she is correct
          lblIntro.setText("Corect!");
          //make the text to display it in green
          lblIntro.setForeground (Color.green);
          //give them points for their efforts
          points = points + 500;
          //display the points awarded
          lblTitle.setText("You have: " + points);
        }
      }
      // if any other answer is given
      else 
      {
        //say they are incorrect
        lblIntro.setText("Incorrect!");
        //right it in red
        lblIntro.setForeground (Color.red);
      }  
    }
  }
}

Answer 1

答案需要与问题相关联(听起来很明显)...

您可以做的是将答案和问题保存在某种Map中，这将允许您根据活跃的问题循环答案。

private Map<String, String> mapQA;
private String currentQuestion;

//...

mapQA = new HashMap<>(4);
mapQA.put(q1, a1); // Or how ever you want to do it...
//...

if (command.equals("Question 1, 100 points"))
{
    //set the text to blank
    btn1.setText("");
    //set the label with the question
    lblInfo.setText(q1);
    currentQuestion = q1;

}
//if this button is clicked...
else if (command.equals("Question 2, 200 points"))

//...

if (command.equals("Check answer"))
{
    //the textfield is equal to the variable input
    input = txtInput.getText();
    String answer = mapQA.get(currentQuestion);
    if (answer.equals(txtInput.getText()) {...

现在，如果是我，我可能还会将每个问题与每个 JButton 相关联...

 Map<JButton, String> mapButtons;

 //...
 btn1 = new JButton ("Question 1, 100 points");
 //...     
 mapButtons = new HashMap<JButton, String>(4);
 mapButtons.put(btn1, "..."); // Question 1...

这样，您就可以简单地使用...

JButton btn = (JButton)event.getSource();

//set the text to blank
btn .setText("");
//set the label with the question
currentQuestion = mapButtons.get(btn)
lblInfo.setText(currentQuestion);

并取消 if 语句，除了“检查答案”按钮;)