[Ch16] QuizCardBuilder: lambdas, breaking into smaller methods, re-arranging... (a9fd5a2f) · Commits · examples / Head First Java 3rd Edition

src/main/java/ch16/QuizCardBuilder.java

+35 −48

Changes for src/main/java/ch16/QuizCardBuilder.java: 35 added lines, 48 removed lines.
Original line number	Diff line number	Diff line
		@@ -2,90 +2,85 @@ package ch16;

		import javax.swing.*;
		import java.awt.*;
		import java.awt.event.*;
		import java.io.*;
		import java.util.ArrayList;

		public class QuizCardBuilder {

		private JTextArea question;
		private JTextArea answer;
		private ArrayList<QuizCard> cardList;
		private ArrayList<QuizCard> cardList = new ArrayList<>();
		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);
		question = createTextArea(bigFont);
		JScrollPane qScroller = createScroller(question);

		answer = new JTextArea(6, 20);
		answer.setLineWrap(true);
		answer.setWrapStyleWord(true);
		answer.setFont(bigFont);
		answer = createTextArea(bigFont);
		JScrollPane aScroller = createScroller(answer);

		JScrollPane aScroller = new JScrollPane(answer);
		aScroller.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
		aScroller.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
		mainPanel.add(new JLabel("Question:"));
		mainPanel.add(qScroller);

		mainPanel.add(new JLabel("Answer:"));
		mainPanel.add(aScroller);

		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);
		nextButton.addActionListener(e -> nextCard());
		mainPanel.add(nextButton);
		nextButton.addActionListener(new NextCardListener());

		JMenuBar menuBar = new JMenuBar();
		JMenu fileMenu = new JMenu("File");

		JMenuItem newMenuItem = new JMenuItem("New");
		newMenuItem.addActionListener(e -> {
		cardList.clear();
		clearCard();
		});

		JMenuItem saveMenuItem = new JMenuItem("Save");
		newMenuItem.addActionListener(new NewMenuListener());
		saveMenuItem.addActionListener(e -> saveCard());

		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) {
		private JScrollPane createScroller(JTextArea question) {
		JScrollPane qScroller = new JScrollPane(question);
		qScroller.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
		qScroller.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
		return qScroller;
		}

		private JTextArea createTextArea(Font bigFont) {
		JTextArea textArea = new JTextArea(6, 20);
		textArea.setLineWrap(true);
		textArea.setWrapStyleWord(true);
		textArea.setFont(bigFont);
		return textArea;
		}

		private void nextCard() {
		QuizCard card = new QuizCard(question.getText(), answer.getText());
		cardList.add(card);
		clearCard();
		}
		}

		public class SaveMenuListener implements ActionListener {
		public void actionPerformed(ActionEvent ev) {
		private void saveCard() {
		QuizCard card = new QuizCard(question.getText(), answer.getText());
		cardList.add(card);

		@@ -93,14 +88,6 @@ public class QuizCardBuilder {
		fileSave.showSaveDialog(frame);
		saveFile(fileSave.getSelectedFile());
		}
		}

		public class NewMenuListener implements ActionListener {
		public void actionPerformed(ActionEvent ev) {
		cardList.clear();
		clearCard();
		}
		}

		private void clearCard() {
		question.setText("");
		@@ -119,7 +106,7 @@ public class QuizCardBuilder {
		writer.close();

		} catch (IOException ex) {
		System.out.println("couldn’t write the cardList out");
		System.out.println("Couldn't write the cardList out");
		ex.printStackTrace();
		}
		}