突然间，对JAVA也找到点感觉了。

package QuizCard.sky.com;

public class QuizCard {
    
    private String qStr;
    private String aStr;
    
    QuizCard (String s1, String s2) {
        qStr = s1;
        aStr = s2;
        
    }
    
    String getQuestion() {
        return qStr;
        
    }
    String  getAnswer() {
        return aStr;
        
    }

}

package QuizCard.sky.com;
import java.util.*;
import java.awt.event.*;
import javax.swing.*;
import java.awt.*;
import java.io.*;

public class QuizCardBuilder {
    
    private JTextArea question;
    private JTextArea answer;
    private ArrayList<QuizCard> cardList;
    private JFrame frame;
    
    public static void main (String[] args) {
        QuizCardBuilder builder = new QuizCardBuilder();
        builder.go();
    }
    
    public void go() {
        frame = new JFrame("Quiz Card Builder");
        JPanel mainPanel = new JPanel();
        Font bigFont = new Font("sanserif", Font.BOLD, 24);
        question = new JTextArea(6, 20);
        question.setLineWrap(true);
        question.setWrapStyleWord(true);
        question.setFont(bigFont);
        
        JScrollPane qScroller = new JScrollPane(question);
        qScroller.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
        qScroller.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
        
        answer = new JTextArea(6, 20);
        answer.setLineWrap(true);
        answer.setWrapStyleWord(true);
        answer.setFont(bigFont);
        
        JScrollPane aScroller = new JScrollPane(answer);
        aScroller.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
        aScroller.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
        
        JButton nextButton = new JButton("Next Card");
        
        cardList = new ArrayList<QuizCard>();
        
        JLabel qLabel = new JLabel("Question:");
        JLabel aLabel = new JLabel("Answer:");
        
        mainPanel.add(qLabel);
        mainPanel.add(qScroller);
        mainPanel.add(aLabel);
        mainPanel.add(aScroller);
        mainPanel.add(nextButton);
        nextButton.addActionListener(new NextCardListener());
        JMenuBar menuBar = new JMenuBar();
        JMenu fileMenu = new JMenu("File");
        JMenuItem newMenuItem = new JMenuItem("New");
        JMenuItem saveMenuItem = new JMenuItem("Save");
        
        newMenuItem.addActionListener(new NewMenuListener());
        saveMenuItem.addActionListener(new SaveMenuListener());
        
        fileMenu.add(newMenuItem);
        fileMenu.add(saveMenuItem);
        menuBar.add(fileMenu);
        
        frame.setJMenuBar(menuBar);
        frame.getContentPane().add(BorderLayout.CENTER, mainPanel);
        frame.setSize(500, 600);
        frame.setVisible(true);
        
    }
    
    public class NextCardListener implements ActionListener {
        public void actionPerformed(ActionEvent ev) {
            QuizCard card = new QuizCard(question.getText(), answer.getText());
            cardList.add(card);
            clearCard();
        }
    }
    public class SaveMenuListener implements ActionListener {
        public void actionPerformed(ActionEvent ev) {
            QuizCard card = new QuizCard(question.getText(), answer.getText());
            cardList.add(card);
            
            JFileChooser fileSave = new JFileChooser();
            fileSave.showSaveDialog(frame);
            saveFile(fileSave.getSelectedFile());
            
        }
    }
    
    public class NewMenuListener implements ActionListener {
        public void actionPerformed(ActionEvent ev) {
            cardList.clear();
            clearCard();
        }
    }
    
    private void clearCard() {
        question.setText("");
        answer.setText("");
        question.requestFocus();
    }
    
    private void saveFile(File file) {
        try {
            BufferedWriter writer = new BufferedWriter(new FileWriter(file));
            
            for(QuizCard card:cardList) {
                writer.write(card.getQuestion() + "/");
                writer.write(card.getAnswer() + "\n");
            }
            writer.close();
        } catch(IOException ex) {
            System.out.println("couldn‘t write the cardList out");
            ex.printStackTrace();
        }
    }

}

package QuizCard.sky.com;
import java.util.*;
import java.awt.event.*;
import javax.swing.*;
import java.awt.*;
import java.io.*;

public class QuizCardPlayer {
    private JTextArea display;
    private JTextArea answer;
    private ArrayList<QuizCard> cardList;
    private QuizCard currentCard;
    private int currentCardIndex;
    private JFrame frame;
    private JButton nextButton;
    private boolean isShowAnswer;
    
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        QuizCardPlayer reader = new QuizCardPlayer();
        reader.go();

    }
    public void go() {
        frame = new JFrame("Quiz Card Player");
        JPanel mainPanel = new JPanel();
        Font bigFont = new Font("sanserif", Font.BOLD, 24);
        
        display = new JTextArea(10, 20);
        display.setFont(bigFont);
        
        display.setLineWrap(true);
        display.setEditable(false);
        
        JScrollPane qScroller = new JScrollPane(display);
        qScroller.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
        qScroller.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
        nextButton = new JButton("Show Question");
        mainPanel.add(qScroller);
        mainPanel.add(nextButton);
        nextButton.addActionListener(new NextCardListener());
        
        JMenuBar menuBar = new JMenuBar();
        JMenu fileMenu = new JMenu("File");
        JMenuItem loadMenuItem = new JMenuItem("Load card set");
        loadMenuItem.addActionListener(new OpenMenuListener());
        fileMenu.add(loadMenuItem);
        menuBar.add(fileMenu);
        frame.setJMenuBar(menuBar);
        frame.getContentPane().add(BorderLayout.CENTER, mainPanel);
        frame.setSize(640, 500);
        frame.setVisible(true);        
    }
    
    public class NextCardListener implements ActionListener {
        public void actionPerformed(ActionEvent ev) {
            if (isShowAnswer){
            display.setText(currentCard.getAnswer());
            nextButton.setText("Next Card");
            isShowAnswer = false;
            } else {
            if (currentCardIndex < cardList.size()) {
                showNextCard();
                } else {
                display.setText("That was last card");
                nextButton.setEnabled(false);
                }
            }
        }
    }
    
    public class OpenMenuListener implements ActionListener {
        public void actionPerformed(ActionEvent ev) {
            JFileChooser fileOpen = new JFileChooser();
            fileOpen.showOpenDialog(frame);
            loadFile(fileOpen.getSelectedFile());
        }
    }
    
    private void loadFile(File file) {
        cardList = new ArrayList<QuizCard>();
        try {
            BufferedReader reader = new BufferedReader(new FileReader(file));
            String line = null;
            while ((line = reader.readLine()) != null) {
                makeCard(line);
            }
            reader.close();
        } catch (Exception ex) {
            System.out.println("couldn‘t read the card file");
            ex.printStackTrace();
        }
    }
    
    private void makeCard(String lineToParse) {
        String[] result = lineToParse.split("/");
        QuizCard card = new QuizCard(result[0], result[1]);
        cardList.add(card);
        System.out.println("made a card");
    }
    
    private void showNextCard() {
        currentCard = cardList.get(currentCardIndex);
        currentCardIndex++;
        display.setText("Show Answer");
        isShowAnswer = true;
    }

}