Saving data to txt file - how long does it take for the data to show up in the file

Programming Questions

luisproce..

Saving data to txt file - how long does it take for the data to show up in the file

in Programming Questions • 5 months ago

Dear Community,

I am saving data to a file with the following command

output = createWriter("log.csv")

I am also using the flush and close commands.

What I have noticed is that only when I stop the program the data gets written to the file.

So my first question is, how often the data gets recorded using the createwriter() comand without stopping the execution of the program.

Thank you very much,

Luis

Replies(3)

GoToLoop

Re: Saving data to txt file - how long does it take for the data to show up in the file

5 months ago

Although I dunno about Processing nor Java IO strategy,

I believe it depends a lot more on the OS & file system being used.

I guess Win8 delays the actual writing in the disk the most!

Mushussu

Re: Saving data to txt file - how long does it take for the data to show up in the file

4 months ago

Hello,

I used the createWriter example :

PrintWriter output;
boolean trace;
void setup() {
trace = false;
}
void draw() {
point(mouseX, mouseY);
if (trace) {
output.println(mouseX + "t" + mouseY); // Write the coordinate to the file
//output.flush(); // Writes the remaining data to the file
}
}
void keyPressed() {
if (key == 'b') {
output = createWriter("positions.txt");
trace = true;
}
if (key == 'e') {
output.flush(); // Writes the remaining data to the file
output.close(); // Finishes the file
trace = false;
}
}

Strike the 'b' to begin the record and 'e' to end the record.

The flush fill the file of data at the end of the record if you want to fill it each frame uncomment the line 14.

It works on MacOSX 10.8

luisproce..

Re: Saving data to txt file - how long does it take for the data to show up in the file

4 months ago

Thank you very much guys!

Cheers,

Luis

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