[英]BufferedWriter is not writing a new line in a file for a String having “\n” added to it
I was trying some stuff in Swing (Java), but getting very strange results. 我在Swing(Java)中尝试了一些东西,但是得到了非常奇怪的结果。
I am getting a String from JTextArea.getText()
method and adding "\\n" to it. 我从
JTextArea.getText()
方法获取一个字符串,并向其中添加“ \\ n”。 This resultant string I am writing into a file, using BufferedWriter
which is chaining through FileOutputStream
to a file. 我使用
BufferedWriter
将结果字符串写入文件,该文件通过FileOutputStream
链接到文件。 But the new line character "\\n" is not creating new line in the .txt file. 但是换行符“ \\ n”不在.txt文件中创建换行。
How can I fix this issue? 如何解决此问题?
My Code is here: 我的代码在这里:
package quizCardGame;
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.util.ArrayList;
import javax.swing.*;
public class QuizCardBuilder extends JFrame {
private static final long serialVersionUID = 1L;
private JTextArea question;
private JTextArea answer;
private Font font;
private ArrayList<QuizCard> deck;
private int countOfDeck;
private JLabel countLable;
public QuizCardBuilder() {
super();
deck = new ArrayList<QuizCard>();
buildGUI();
}
public static void main(String[] args) {
QuizCardBuilder app = new QuizCardBuilder();
}
public void buildGUI() {
font = new Font(Font.SERIF, Font.BOLD, 12);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JPanel panel = new JPanel();
this.getContentPane().add(BorderLayout.CENTER, panel);
JPanel stats = new JPanel();
countLable = new JLabel("Count: " + countOfDeck);
stats.add(countLable);
this.getContentPane().add(BorderLayout.SOUTH, stats);
JLabel qLable = new JLabel("Question");
panel.add(qLable);
question = new JTextArea(5, 30);
question.setLineWrap(true);
question.setWrapStyleWord(true);
question.setFont(font);
JScrollPane qScroller = new JScrollPane(question);
qScroller
.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
qScroller
.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
panel.add(qScroller);
JLabel aLable = new JLabel("Answer");
panel.add(aLable);
answer = new JTextArea(5, 30);
answer.setLineWrap(true);
answer.setWrapStyleWord(true);
answer.setFont(font);
JScrollPane aScroller = new JScrollPane(answer);
aScroller
.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
aScroller
.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
panel.add(aScroller);
JButton nextButton = new JButton("Next");
nextButton.addActionListener(new NextCardListener());
panel.add(nextButton);
JMenuBar menuBar = new JMenuBar();
JMenu fileMenu = new JMenu("File");
JMenuItem newMenuItem = new JMenuItem("New");
JMenuItem saveMenuItem = new JMenuItem("Save");
fileMenu.add(newMenuItem);
fileMenu.add(saveMenuItem);
menuBar.add(fileMenu);
this.setJMenuBar(menuBar);
newMenuItem.addActionListener(new NewMenuListener());
saveMenuItem.addActionListener(new SaveMenuListener());
this.setSize(350, 350);
this.setVisible(true);
}
public class SaveMenuListener implements ActionListener {
@Override
public void actionPerformed(ActionEvent e) {
deck.add(new QuizCard(question.getText(), answer.getText()));
JFileChooser fileSave = new JFileChooser();
fileSave.showSaveDialog(null);
saveFile(fileSave.getSelectedFile());
}
}
public void saveFile(File file) {
try {
BufferedWriter bw = new BufferedWriter(new FileWriter(file));
for (QuizCard card : deck) {
bw.write(card.getQuestion() + "/");
bw.write(card.getAnswer() + "\n");
}
bw.close();
} catch (IOException e) {
e.printStackTrace();
}
}
public class NewMenuListener implements ActionListener {
@Override
public void actionPerformed(ActionEvent e) {
deck.clear();
countOfDeck = deck.size();
countLable.setText("Count: " + countOfDeck);
clearText();
}
}
public class NextCardListener implements ActionListener {
@Override
public void actionPerformed(ActionEvent e) {
deck.add(new QuizCard(question.getText(), answer.getText()));
countOfDeck = deck.size();
countLable.setText("Count: " + countOfDeck);
clearText();
}
}
private void clearText() {
question.setText("");
answer.setText("");
}
}
Use instead BufferedWriter.newLine()
which: 使用
BufferedWriter.newLine()
代替:
Writes a line separator.
写一个行分隔符。 The line separator string is defined by the system property
line.separator
, and is not necessarily a single newline ('\\n') character.行分隔符字符串由系统属性
line.separator
定义, 不一定是单个换行符('\\ n')。
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