import java.io.FileInputStream;
import java.nio.MappedByteBuffer;
import java.nio.channels.FileChannel;
public class Main {
public static void main(String args[]) throws Exception {
String filename = args[0];
int start = 10;
int length = 20;
FileInputStream fin = new FileInputStream(filename);
FileChannel finc = fin.getChannel();
MappedByteBuffer mbb = finc.map(FileChannel.MapMode.READ_ONLY, start, length);
for (int i = 0; i < length; ++i) {
System.out.println(mbb.get(i);
}
fin.close();
}
}