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Newline character in txt file(notepad) displayed as square character

Posted on 2011-02-25
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Last Modified: 2012-06-27
	
public void appendToFile(String content){
		try {
			 PrintStream outToFile = new PrintStream(new BufferedOutputStream(new FileOutputStream(fileHandle.getPath(), true)));
			outToFile.println(content);
			outToFile.close();
			
		} catch (IOException e) {
			e.printStackTrace();
			throw new RuntimeException("Unable to Write to File");
		}
	}

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 appendToFile("blah blah blah \r\n");

The file shows up fine in the eclipse editor but whyen opened in notepad the line breaks are displayed as square characters.

                  
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Question by:PearlJamFanatic
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Expert Comment

by:dougaug
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In which operating system are you running the code above?
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Author Comment

by:PearlJamFanatic
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windows xp
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Expert Comment

by:CEHJ
Comment Utility
>>appendToFile("blah blah blah \r\n");

Not sure where the above fits in ..?

Are you working on a system other that Windows and then opening the file in Notepad?
Notepad won't deal with non-Windows line feeds - use WordPad instead
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by:CEHJ
Comment Utility
Worthwhile attaching (not pasting) the text file in question if you can
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Author Comment

by:PearlJamFanatic
Comment Utility
I am creating in xp and opening in xp. yes it opens up fine in wordpad.

Isn't there any way to do this such as it will be displyed properly in notepad.
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Author Comment

by:PearlJamFanatic
Comment Utility
attached.
result.txt
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Expert Comment

by:dougaug
Comment Utility
It seems that the file was generated in some unix environment and you are trying opening it on Windows.

If you do this, depending on how the file was transfered, the character "\n" is showed as a square in notepad.
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by:CEHJ
Comment Utility
I suspect 'content' has lone newlines ( '\n' ) embedded in it
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Author Comment

by:PearlJamFanatic
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there was one lone \n instance which has been corrected now. The problem still persists however.
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Expert Comment

by:CEHJ
Comment Utility
Yes, as i suspected, there are hardcoded newlines in the content. Try the following:
public void appendToFile(String content) {
		try {
			PrintStream outToFile = new PrintStream(new BufferedOutputStream(
						new FileOutputStream(fileHandle.getPath(), true)));
			Scanner in = new Scanner(content);

			while (in.hasNextLine()) {
				outToFile.println(in.nextLine());
			}

			in.close();
			outToFile.close();
		} catch (IOException e) {
			e.printStackTrace();
			throw new RuntimeException("Unable to Write to File");
		}
	}

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by:dougaug
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Add the following line to your code and see what is the default encoding used to write the file and post the result here, please.

System.out.println(System.getProperty("file.encoding"));
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Expert Comment

by:dougaug
Comment Utility
Add this line too:

System.out.println(Charset.defaultCharset().displayName());
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objects earned 500 total points
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>                   outToFile.println(content);

your using the platform default line ending here

>  appendToFile("blah blah blah \r\n");

And your hardcoding the end of line and adding an extra one
you need to do one or the other

eg. use the following if you're hard coding

outToFile.print(content);

or to use platform default use:

 appendToFile("blah blah blah");
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Expert Comment

by:kusheelkumar
Comment Utility
HI

You need choose the encoding in Notepad as UTF-8, and then try to open it.

Notepad shows special characters if not encoded as UTF-8.

Kusheel
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Expert Comment

by:CEHJ
Comment Utility
The issue is nothing to do with encoding - it's to do with linefeeds
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Author Comment

by:PearlJamFanatic
Comment Utility
i removed the /r/n and now it's working. BTW is i don't use println then what line break code should i use. This solution should work for notepad.
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Expert Comment

by:objects
Comment Utility
depends on what platform you're going to be opening the file
if you're opening it on the same platform that you're java app is running you can use System.getProperty("line.separator")
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