Bufferedwriter works, but file empty?

Question

I have the following code:

CSVmaker(LinkedList data) {
    String [] myLines = makeStrings(data);
  //  for (int k = 0; k

        

Answer 1

Though the question is answered . I would like to add how buffer works.

whenever you try to write to a file using buffer,whatever you write gets added to the buffer. When the buffer is full the contents are written to the file . This way we are reducing the number of hits to the hard-drive hence improving the efficency.

If we want to forcefully write to a file without the buffer getting full , we use flush() method.

Answer 2

Starting with Java 8, one would simply do it with a try with resources, which automatically closes the BufferedWriter. Also see the usage of the new class Files

try (BufferedWriter writer = Files.newBufferedWriter(somePath, yourCharset)){
    writer.write(output);
}

Answer 3

You have to close() the stream after use.
Call buff.close() after write loop; BufferedWriter will flush data to file at close.

Answer 4

You never flush the buffer, or close the BufferedWriter.

After the for loop, make the following calls:

buff.flush();
buff.close();

Even with other resources, closing them when done is a good idea.