Question about a recent thread: reading from a JTextComponent

[atom86]

In a recent thread where i've partecipated too..

the original poster wanted to write in a file the content of a jtextarea.. when i said that you can use the write() method of JTextComponent, or if you prefer use getText() and manually write the string into the file,...

camickr said:

"Doing the work your self means you won't have the proper "newline" string added to your file depending on the OS you are using. "

That's absolutely correct!... but.. if i need to process/modify/doSomething to the string in the jTextArea BEFORE to write the string in a file... i can't use

jTextArea.write(myWriter);

So in that situation what should i do? ..in order to avoid the problem that camickr said?

[r035198x]

Why exactly can't you use

jTextArea.write(myWriter);

?

[PhHein]

As far as I understand, he doesn't want to write the String that's returned by getText(), but a modifyed String.

[r035198x]

Okey, well just use a PrintWriter then and use PrintWriter.println() for the new lines?

[atom86]

As far as I understand, he doesn't want to write the String that's returned by getText(), but a modifyed String.

that's the point! But if i use getText() and i write the returned String in a file using for example a FileWriter i'll find the problem that camickr said.

Answering to r035... the only way (that i can think) to use the write method is:

String s = jtext.getText();

//doSomething whith s

jtext.setText(s);

jtext.write(myWriter);

but doing things in this way force the user watching the GUI, to see the String modified in JTextArea..... isn't there any smarter solution you can suggest me in order to avoid the call "setText()"?

thanks

[atom86]

Okey, well just use a PrintWriter then and use PrintWriter.println() for the new lines?

i start answering before to read your post...

thanks for your answer, so what camickr said in previous thread was not totally true... we can manually write the String from getText() but using PrintWriter..

thanks again... now everything is clear.

[r035198x]

... well just use a PrintWriter then and use PrintWriter.println() for the new lines

This message is no longer a very short message therefore the forum software will now allow it to be submitted.

[r035198x]

... so what camickr said in previous thread was not totally true... we can manually write the String from getText() but using PrintWriter...

I would be very careful with such statements if I were you.

[atom86]

This message is no longer a very short message therefore the forum software will now allow it to be submitted.

sorry i don't understand what do you mean..

I would be very careful with such statements if I were you.

HEY! CALM down friend!! This is a java forum.. not a mafious family where if a boss say "2+2=5" we must say "yes it's true"..
personally i thanks all of you for your help but i don't care who you are.... camickr is a person just like me and you he's not a god..maybe an excellent java programmer but he's not a god... i'm here to improve my java-programming skills and understand what i can and what i can't do with java... any other reason...

so YOU said that with PrintWriter YOU can write correctly newlines... "bypassing" the problem that camickr said previously... is it correct?

[PhHein]

Uh oh. :eek:

[zweibieren]

See the discussion of line ending in DefaultEditorKit. The internal line ending is always '\n'

The application may call for a specific form of line terminator, say RS ('\u00E3').
If so the code could be:

String s = jtext.getText();
// do Something with s
s = s.replace('\n', '\u00E3');
stream.write(s);

or one could manually convert to the system dependent line terminator

String s = jtext.getText();
// do Something with s
s = s.replace('\n', System.getProperty("line.separator"));
stream.write(s);

[camickr]

Well the point of my comment was that you can't just write out the entire string when you use getText(). If you use getText() then you would need to alter the String by replacing the "\n" using the suggestions above. Then you can write the text out using any means you want. It would not have to be a PrintWriter.

However, just using a PrintWriter will not solve your problem because you can't just use getText() and then use the PrintWriter to write it out. The newlines characters imbedded in the string will not automatically be converted. Instead you need to read the text one line at a time from the text area, then you need to write that line of text, then you need to manually add a new line. So you have to write your own loop to process each line in the text area individually.