Question

I have a simple program that needs to write a few lines of string to a file using FileWriter and BufferedWriter. It already reads the (in this case) exact same data from the file, it stores it in runtime memory, but it outright refuses to write it and I have no idea why. Usually I’d try to debug it and see what’s happening but I have no idea what I’m looking for.

Here is my code:

public void close () {
    FileWriter output = null;
    BufferedWriter fileOut = null;

    // I use the exact same method to read from file so this should work
    // this.prajituri :: ArrayList
    // toString is @Override

    try {
        output = new FileWriter(this.fileName);
        fileOut = new BufferedWriter(output);

        for (int i = 0; i < this.prajituri.size(); i++) {
            fileOut.write(prajituri.get(i).toString());
            System.out.println(prajituri.get(i).toString());
            fileOut.newLine();
        }
    } catch (IOException ioe) {
        System.out.println("Output error: " + ioe);
    } finally {
        if (fileOut != null)
            fileOut = null;
        if (output != null)
            output = null;
    }
}

Just in case, here is my toString:

@Override
public String toString () {
    return this.name + ";" + this.weight + ";" + this.price;
}

Every time I try to write to file, it gives me an empty file. Am I doing something wrong ?

I checked and this.prajituri is actually good (has all the data it should have)
And I use the System.out.println(prajituri.get(i).toString()) to check what it Should write and that is OK also. Yet it writes nothing.

Answer 1

To write to disk immediately:

output.flush();

When done:

output.close();

close( ) includes flush( )