Want to add line to file using PrintWriter class in Java. File created, data isn't saved

Question

I want my program to create a new text file unless one already exists. Any way, I want to print one line to the file for each time the program is run. The file is created but no data is saved to it. Why?

File fileName = new File("fileName");

try {
    if (fileName.exists())
    {
        filePrinter = new PrintWriter(new FileOutputStream(fileName));
    }
    else
    {
        filePrinter = new PrintWriter(new FileOutputStream(fileName, true));
    }

} catch (FileNotFoundException e1) 
    {
        e1.printStackTrace();
    }

//irrelevant code


filePrinter.println("some text" + integerValue + "then more text");
filePrinter.close();

it was a remnant of the original code, i changed the names before posting here. It's now changed. — user2979713, Dec 17 '13 at 16:32

Ashish · Answer 1 · 2013-12-17T16:50:31.390

0

I would recommend flushing out the content before closing it.

filePrinter.flush();

if this doesnt work try the following:

filePrinter = new FileWriter(new File(fileName));
filePrinter.write("some text" + integerValue + "then more text");
filePrinter.flush();
filePrinter.close();

edited Dec 17 '13 at 16:50

answered Dec 17 '13 at 15:47

Ashish

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I did, but it doesn't change the result. the file fileName is still empty. – user2979713 Dec 17 '13 at 16:35

score 0 · Answer 2 · answered Dec 17 '13 at 17:50

The problem was outside the posted code, all apologies. The problem was that the

    //irrelevant code

Contained instructions to reset the program upon certain conditions. Those conditions were always true, and so the filePrinter.println() code was never reached.

Thank you for all input.

Want to add line to file using PrintWriter class in Java. File created, data isn't saved

2 Answers2