Develop Reference

How to save multiple line from JTextArea to a File in Java

I'm making a simple notepad, which will save the content from JTextArea to a File. But i have a problem, i'm not able to save a multiline text.
Here's my code:
JTextArea textArea = new JTextArea();
File writeFile;
FileWriter fileWriter = null;
BufferedWriter bufWriter = null;
writeFile = new File("note.txt");
try {
fileWriter = new FileWriter(writeFile);
bufWriter = new BufferedWriter(fileWriter);
bufWriter.write(textArea.getText());
bufWriter.close();
} catch (IOException e) {
e.printStackTrace();
}
For example, i have a button and a textarea. When I input something like this:
test line 1
test line 2
and press the button to save, the file created. but the contents of the file, become like this
test line 1test line 2
Please give me a detail answer, so i can understand properly. i'm new in java GUI.
Thank you very much.

after trying your code, i see that your code only save the text in a single line. for example in the text area it's looked like this
first line
second line
third line
but in the file you just got
first linesecond linethird line
if that is the case you can use this code
File writeFile;
Writer writer = null;
writeFile = new File("D:\\note.txt");
try {
writer = new BufferedWriter(new OutputStreamWriter(
new FileOutputStream(writeFile), "utf-8"));
jTextArea1.write(writer);
} catch (IOException ex) {
// report
} finally {
try {
writer.close();
} catch (Exception ex) {/*ignore*/
}
}
in this code we use writer from jtextarea itself, so it will save the text as we see at the jtextarea.
hope this help

java textarea and input to file

I'm having problems in my Java app. I wanted to transfer the texts in my JTextArea to a .txt file
for example
I inputted
"Hi
my name is george"
I want the outcome in my .txt file to be the same
but what happens is
"Himy name is george"
Here's my code
private void btnCreateActionPerformed(java.awt.event.ActionEvent evt) {
String filename,content;
String[] ArrContent=new String[9999];
int wordctr=0;
try
{
if(txtFilename.getText().isEmpty())
{
lblRequired.setText("Required Field");
}else
{
lblRequired.setText(" ");
filename=txtFilename.getText()+".txt";
FileWriter fw=new FileWriter(filename);
BufferedWriter writer = new BufferedWriter(fw);
if(txtContent.getText().contains("\r\n"))
writer.write("\r\n");
writer.write(txtContent.getText());
writer.close();
}
}

Try using JTextArea#write(Writer) instead...
String filename = txtFilename.getText()+".txt";
try (FileWriter fw = new FileWriter(new File(filename))) {
txtContent.write(fw);
} catch (IOException exp) {
exp.printStackTrace();
}
And make sure you making best efforts to close the resources that you create...

You need to use System.lineSeparator() to write a new line to a text file.
So try something like the following
if(txtContent.getText().contains("\r\n"))
writer.write(System.lineSeparator());

JTextArea txt; txt.getText() skips "\n"

i have some text in TextArea, and i want to save it in file, my code is here:
private void SaveFile() {
try {
String content = txt.getText();
File file = new File(filename);
if (!file.exists()) {
file.createNewFile();
}
FileWriter fw = new FileWriter(file.getAbsoluteFile());
BufferedWriter bw = new BufferedWriter(fw);
bw.write(content);
bw.close();
} catch (IOException e) {
e.printStackTrace();
}
}
but it saves without "\n"; and in new file everything is on one line;
ho can i foresee those "enters" too?
thank you in advance
the problem was because of notepad, so here is solution:
private void SaveFile() {
try {
String content = txt.getText();
content = content.replaceAll("(?!\\r)\\n", "\r\n");
File file = new File(filename);
// if file doesnt exists, then create it
if (!file.exists()) {
file.createNewFile();
}
FileWriter fw = new FileWriter(file.getAbsoluteFile());
BufferedWriter bw = new BufferedWriter(fw);
bw.write(content);
bw.close();
} catch (IOException e) {
e.printStackTrace();
}
}
Thanks for helping

It should work. Try to use a text editor that display the line endings \r and \n and see what comes up.
If you want to be sure that the text file can be open by windows utilities like Notepad that only understand \r\n, you have to normalize it yourself this way:
content = content.replaceAll("(?!\\r)\\n", "\r\n");
This will replace all \n who is not preceded by a \r by the sequence \r\n.

You should use the read() and write() methods provided by the Swing text components. See Text and New Lines for more information.
If you want the output to contain a specific EOL string then you should use the following after creating the Document for your text component:
textComponent.getDocument().putProperty(DefaultEditorKit.EndOfLineStringProperty, "\r\n");

The \ character escapes the next character, as you say \n will create a newline. If you wish to output an actual \, you need to write:
"\n"

You can use a PrintWriter to print new Line to a file . On scanning TextArea's text if the TextArea's text contains "\\n" then use PrintWriter's println() method else make use of simply print() !

You have the content of your TextArea in a String. Now you can split it at newline, then you will get your String[]. Then you can iterate the String[] array and write it in your file:
private void SaveFile() {
try {
String content = txt.getText();
File file = new File(filename);
if (!file.exists()) {
file.createNewFile();
}
FileWriter fw = new FileWriter(file.getAbsoluteFile());
BufferedWriter bw = new BufferedWriter(fw);
for (String line : content.split("\\n")) {
bw.write(content);
}
bw.close();
} catch (IOException e) {
e.printStackTrace();
}
}

Writing JTextArea content into file

I have one JTextArea and a Submit button in Java Swing.
Need to write the content of textarea into a file with line breaks.
I got the output like, it is written as one string in the file.
try {
BufferedWriter fileOut = new BufferedWriter(new FileWriter("filename.txt"));
String myString1 =jTextArea1.getText();
String myString2 = myString1.replace("\r", "\n");
System.out.println(myString2);
fileOut.write(myString2);
fileOut.close();
} catch (IOException ioe) {
ioe.printStackTrace();
}
Please get me some suggestions

Why not use JTextArea's built in write function?
JTextArea area = ...
try (BufferedWriter fileOut = new BufferedWriter(new FileWriter(yourFile))) {
area.write(fileOut);
}

Replace all \r and \n with:
System.getProperty("line.separator")
This will make your code platform-independent and will write new lines to the files where necessary.
Edit: since you use BufferedWriter, you could also use the newLine() method

Why did you replace \r by \n ?
The line separator should be "\r\n".

This is what i thought up of :
public void actionPerformed(ActionEvent event) {
BufferedWriter writer;
try {
writer = new BufferedWriter(new FileWriter("SimpleText.txt",
false));
text.write(writer);
writer.close();
JOptionPane.showMessageDialog(null, "File has been saved","File Saved",JOptionPane.INFORMATION_MESSAGE);
// true for rewrite, false for override
} catch (IOException e) {
JOptionPane.showMessageDialog(null, "Error Occured");
e.printStackTrace();
}
}
Hope this helps

how to append the written data to a file?

i am new developer in android.i would like to write some content to a file i have used a method to write into a file as follows
public void writeFile(String path,String text){
try{
Writer output = null;
File file = new File(path);
output = new BufferedWriter(new FileWriter(file));
output.write(text);
output.close();
System.out.println("Your file has been written");
}
catch (Exception e) {
e.printStackTrace();
}
here i am passing path of a file and text to write.if i use in this way i can write the data but the previous data is losing.
how can i append or insert the latest text into a file without losing previous text?
Thanks in advance

Try this. Change this line ...
output = new BufferedWriter(new FileWriter(file));
to
output = new BufferedWriter(new FileWriter(file, true));
The true indicates that you want to append not overwrite

Have a look here and try:
new FileWriter(file, true);
the boolean indicates whether or not to append to an existing file.