import java.io.File;
import java.io.IOException;
import java.io.RandomAccessFile;
import java.nio.IntBuffer;
import java.nio.channels.FileChannel;
public class MainClass {
public static void main(String[] args) throws IOException {
FileChannel fc = new RandomAccessFile(new File("temp.tmp"), "rw").getChannel();
IntBuffer ib = fc.map(FileChannel.MapMode.READ_WRITE, 0, fc.size()).asIntBuffer();
ib.put(0);
for (int i = 1; i < 10; i++)
ib.put(ib.get(i - 1));
fc.close();
}
}