[問題] 請問關於TextField的迴圈結構問題

[pugboy ()]

http://ppt.cc/ivJt

請問各位大大

我想寫的程式功能是:設計五個問題測驗,要求輸入答案,第一次答對得20分,第二次答對得
10分,第二次答錯不給分,但給予正確答案．每次答完一題,即顯示目前累計得分.

但是我寫的程式出現的bug為,我輸入一次之後它就直接給我衝到最後一次,沒有停下來讓
我再輸入判斷一次...
應該是我的邏輯或寫法上面有問題,請求高手大大糾正我一下
謝謝!

重點問題code區(Problem Point):

public void actionPerformed(ActionEvent e) {
        if(e.getSource() == btnOK){
            while(opportunity < 2 && is_pass == false){
                switch (opportunity) {
                    case 0:
                        if(txtAnswer.getText().equals("8")){
                            lblReply.setText("你答對了");
                            btnOK.setText("下一題");
                            score += 20;
                            lblScore.setText("目前得分: "+score);
                            is_pass = true;
                        }
                        else{
                            lblReply.setText("你答錯了");
                            opportunity += 1;
                        }
                        break;
                    case 1:
                        if(txtAnswer.getText().equals("8")){
                            lblReply.setText("你答對了");
                            btnOK.setText("下一題");
                            score += 10;
                            lblScore.setText("目前得分: "+score);
                            is_pass = true;
                        }
                       else{
                            lblReply.setText("你答錯了");
                            txtAnswer.setText("8");
                            opportunity += 1;
                        }
                        break;
                }
































全部程式碼如下:

package BOOK;
import java.awt.event.*;
import javax.swing.*;

class CDialogue extends JFrame implements ActionListener {
    private JTextField txtAnswer;
    private JButton btnOK;
    private JLabel lblTitle, lblQuestion, lblAnswer, lblReply, lblScore;
    static int number = 1;
    private boolean is_pass = false;
    private int opportunity = 0, score = 0;
    CDialogue(){
        lblTitle = new JLabel("第"+number+"題");
        lblTitle.setBounds(10, 20, 50, 20);         add(lblTitle);
        lblQuestion = new JLabel("2 + 6 = _______");
        lblQuestion.setBounds(10, 50, 150, 20);     add(lblQuestion);
        lblAnswer = new JLabel("作答:");
        lblAnswer.setBounds(10, 80, 50, 20);        add(lblAnswer);
        lblReply = new JLabel("");
        lblReply.setBounds(10, 110, 100, 20);        add(lblReply);
        lblScore = new JLabel("目前得分:0");
        lblScore.setBounds(10, 140, 120, 20);       add(lblScore);
        txtAnswer = new JTextField("");
        txtAnswer.setBounds(50, 80, 70, 20);        add(txtAnswer);
        btnOK = new JButton("確定");
        btnOK.setBounds(130, 80, 90, 20);            add(btnOK);

        setTitle("測驗");                           setLayout(null);
        setBounds(100, 100, 260, 260);              setVisible(true);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        btnOK.addActionListener(this);
    }

    @Override
    public void actionPerformed(ActionEvent e) {
        if(e.getSource() == btnOK){
            while(opportunity < 2 && is_pass == false){
                switch (opportunity) {
                    case 0:
                        if(txtAnswer.getText().equals("8")){
                            lblReply.setText("你答對了");
                            btnOK.setText("下一題");
                            score += 20;
                            lblScore.setText("目前得分: "+score);
                            is_pass = true;
                        }
                        else{
                            lblReply.setText("你答錯了");
                            opportunity += 1;
                        }
                        break;
                    case 1:
                        if(txtAnswer.getText().equals("8")){
                            lblReply.setText("你答對了");
                            btnOK.setText("下一題");
                            score += 10;
                            lblScore.setText("目前得分: "+score);
                            is_pass = true;
                        }
                       else{
                            lblReply.setText("你答錯了");
                            txtAnswer.setText("8");
                            opportunity += 1;
                        }
                        break;
                }
            }
        }
    }
}

public class Empathy {
    public static void main(String[] args){
        CDialogue dia = new CDialogue();
    }
}

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