how to delete the content of text file without deleting itself

Question

I want to copy the content of file \'A\' to file \'B\'. after the copying is done I want to clear the content of file \'A\' and want to write on it from its beginning. I can

Answer 1

Simple, write nothing!

FileOutputStream writer = new FileOutputStream("file.txt");
writer.write(("").getBytes());
writer.close();

Answer 2

FileOutputStream fos = openFileOutput("/*file name like --> one.txt*/", MODE_PRIVATE);
FileWriter fw = new FileWriter(fos.getFD());
fw.write("");

Answer 3

you can write a generic method as (its too late but below code will help you/others)

public static FileInputStream getFile(File fileImport) throws IOException {
      FileInputStream fileStream = null;
    try {
        PrintWriter writer = new PrintWriter(fileImport);
        writer.print(StringUtils.EMPTY);
        fileStream = new FileInputStream(fileImport);
        } catch (Exception ex) {
            ex.printStackTrace();
        } finally {
            writer.close();
        }
         return fileStream;
}

Answer 4

I don't believe you even have to write an empty string to the file.

PrintWriter pw = new PrintWriter("filepath.txt");
pw.close();

Answer 5

Just write:

FileOutputStream writer = new FileOutputStream("file.txt");

Answer 6

If you don't need to use the writer afterwards the shortest and cleanest way to do it would be like that:

new FileWriter("/path/to/your/file.txt").close();