Making a new line in a file

Question

Im trying to write a text to file, but it overwrites whats inside, can somebody explain how to check if the text exists and then put a new line and write? Here is the code I am working with:

try
{
    if (!file.exists())
    {
        file.createNewFile();
    }

    FileWriter fw =
        new FileWriter(file.getAbsoluteFile());
    BufferedWriter bw = new BufferedWriter(fw);
    bw.newLine();
    bw.write(petName);
    bw.close();
    System.out.println("Done!");
}
catch (IOException exc)
{
    System.out.println(exc);
}

Thank you for any kind of help.

Braj · Accepted Answer · 2014-05-24T08:34:31.423

0

how to check if the text exists and then put a new line and write?

Use File#length() to check if the text exists in the file.

if(file.length()>0){
    bw.newLine();
}

Note: Open the file in append mode if you don't want to override the existing content of the file.

edited May 24 '14 at 08:34

answered May 24 '14 at 08:28

Braj

46,415
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score -1 · Answer 2 · answered May 24 '14 at 08:28

-1

Use following to append if file exists.

FileWriter fw = new FileWriter(file.getAbsoluteFile(), true);

answered May 24 '14 at 08:28

Timuçin

4,653
3
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34

how to check if the text exists and then put a new line and write? – Braj May 24 '14 at 08:32
It will not prevent to put the new line at the beginning if file is created first time. – Braj May 24 '14 at 08:34

Making a new line in a file

2 Answers2