CODEWITHSUNDEEP
javawindows
davidstar
davidstar

Reputation: 228

Writing multiple lines to a new file in java?

When I open the newly written file in jGRASP, it contains many lines of text. When I open the same text file in notepad, it contains one line of text with the same data. The transFile is just a variable for the name of the text file that I am making.

FileWriter f = new FileWriter(transFile, true);
BufferedWriter out = new BufferedWriter(f);
out.write(someOutput + "\n");
out.close();
f.close();

I have changed the code to the following and it fixed the problem in notepad.

out.write(someOutput + "\r\n");

Why does this happen?

Upvotes: 1

Views: 7119

Answers (3)

djangofan
djangofan

Reputation: 29689

You could do it this way also:

public void appendLineToFile(String filename, String someOutput) {        
    BufferedWriter bufferedWriter = null;        
    try {            
        //Construct the BufferedWriter object
        bufferedWriter = new BufferedWriter(new FileWriter(filename));            
        //Start writing to the output stream
        bufferedWriter.append( someOutput );
        bufferedWriter.newLine();
    } catch (FileNotFoundException ex) {
        ex.printStackTrace();
    } catch (IOException ex) {
        ex.printStackTrace();
    } finally {
        //Close the BufferedWriter
        try {
            if (bufferedWriter != null) {
                bufferedWriter.flush();
                bufferedWriter.close();
            }
        } catch (IOException ex) {
            ex.printStackTrace();
        }
    }
}

Upvotes: 1

Brian Roach
Brian Roach

Reputation: 76918

The default line separator for windows (historically) is \r\n. The windows "notepad" app only recognizes that separator.

Java actually knows the default line separator for the system it's running on and makes it available via the system property line.separator. In your code you could do:

...
out.write(someOutput);
out.newLine();
...

the newLine() method appends the system's line separator as defined in that property.

Upvotes: 1

NolanPower
NolanPower

Reputation: 409

\r\n is the windows carriage return, which is what notepad will recognize. I'd suggest getting Notepad++ as it's just much much better.

Upvotes: 2

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