import java.io.ByteArrayOutputStream;
import java.io.DataOutputStream;
import java.io.FileOutputStream;
import java.io.IOException;
public class Main {
public static void main(String args[]) throws IOException {
int howMany = 20;
// To avoid resizing the buffer, calculate the size of the
// byte array in advance.
ByteArrayOutputStream bout = new ByteArrayOutputStream(howMany * 4);
DataOutputStream dout = new DataOutputStream(bout);
for (int i = 0; i <= 20; i++) {
dout.writeInt(i);
}
FileOutputStream fout = new FileOutputStream("fibonacci.dat");
try {
bout.writeTo(fout);
fout.flush();
} finally {
fout.close();
}
}
}
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