Out of memory error

Hi everyone!

I have some problems writing on a file..after some time a 
java.lang.OutOfMemoryError is thrown such as follows:

java.lang.OutOfMemoryError
     in java.io.OutputStreamWriter.<init><@JPC=110025>
     in java.io.FileWriter.<init><@JPC=160008>
     in Misura.Scrivifile<@JPC=a005c>
     in java.lang.system.???


As I can see the problem is in the method Scrivifile in my class called Misura.
I have to write a .txt file with two float type values and have to refresh it 
periodically.
The problem happens when I start a webserver (the same of the examples in 
ftp.dalsemi.com) together with the process Misura that performs some 
measurements and writes them on a file; after a while my TINI displays the 
error and exits from the two processes.

What can I do?

Thanks for support!

Best regards,
Erio Magnoni.

Here is the source code:


public class Misura
{

     public static int controllo = 0;

.....

     Scrivifile(1, vis1); // vis1 and vis2 are two float type values
     Scrivifile(7, vis2);

.....

static void Scrivifile(int i, float sample) throws IOException
{

	if(controllo != 0 && controllo < 2)
	{
		try {

    		BufferedWriter out = new BufferedWriter(new FileWriter 
("data.txt", true));
    		PrintWriter printout = new PrintWriter(out);
        	printout.println(i + ", " + sample);
        	printout.close();
        	controllo++;


    	} catch (IOException e) {}

	} else {
		try {

			boolean exists = (new File("data.txt")).exists();

			if (exists) {
			// Il file o la directory esistono

				boolean success = (new File("data.txt")).delete
();
					if (!success) {
				        // Cancellazione non effettuata
				        System.out.println("Errore, 
cancellazione non effettuata!");
				    }


			BufferedWriter out = new BufferedWriter(new FileWriter
("data.txt"));
			PrintWriter printout = new PrintWriter(out);
		    printout.println("Valori rilevati:");
		    printout.println(i + ", " + sample);
		    printout.close();
		    controllo = 0;
		    controllo++;



			} else {
			// Il file o la directory non esistono

			BufferedWriter out = new BufferedWriter(new FileWriter
("data.txt"));
			PrintWriter printout = new PrintWriter(out);
			printout.println("Valori rilevati:");
			printout.println(i + ", " + sample);
			printout.close();
			controllo = 0;
		    controllo++;


			}


	    } catch (IOException e) {}

	}


}

.....

}





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