Head First Java - QuizCardBuilder won't compile

[Brian Altman]

Hi,

I can't get this to compile. Where are my errors?

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() {
		//build gui

		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();
		}
	}
}

Here are the errors I'm receiving:
QuizCardBuilder.java:11: cannot find symbol
symbol : class QuizCard
location: class QuizCardBuilder
private ArrayList<QuizCard> cardList;
^
QuizCardBuilder.java:45: cannot find symbol
symbol : class QuizCard
location: class QuizCardBuilder
cardList = new ArrayList<QuizCard>();
^
QuizCardBuilder.java:75: cannot find symbol
symbol : class QuizCard
location: class QuizCardBuilder.NextCardListener
QuizCard card = new QuizCard(question.getText(), answer.getText());
^
QuizCardBuilder.java:75: cannot find symbol
symbol : class QuizCard
location: class QuizCardBuilder.NextCardListener
QuizCard card = new QuizCard(question.getText(), answer.getText());
^
QuizCardBuilder.java:84: cannot find symbol
symbol : class QuizCard
location: class QuizCardBuilder.SaveMenuListener
QuizCard card = new QuizCard(question.getText(), answer.getText());
^
QuizCardBuilder.java:84: cannot find symbol
symbol : class QuizCard
location: class QuizCardBuilder.SaveMenuListener
QuizCard card = new QuizCard(question.getText(), answer.getText());
^
QuizCardBuilder.java:110: cannot find symbol
symbol : class QuizCard
location: class QuizCardBuilder
for(QuizCard card:cardList) {
^
7 errors

Thanks in advance for any help!

[Kemal Sokolovic]

Based on the messages you get, you're missing classes (QuizCard and QuizCardBuilder for start).

If you have the source code of these classes, then you need to make your class available to see it (either put all of them in the same package or add import statement in your existing class).

[Brian Altman]

Class QuizCardBuilder is in my code above. I don't see a QuizCard class anywhere in the book.

[Brian Altman]

Nevermind, I just read in the book that I'm supposed to make the QuizCard class myself.

Thanks for the reply Kemal!

[Kemal Sokolovic]

Sorry about that, I reviewed post over phone and missed the class name in the code.

If there is a source code for the book available for download (probably there is, as for the most of the books) you might find the class missing there.