import java.io.*;
public class B{
        public static void main(String[] args)throws IOException{
                try{FileInputStream leser= new FileInputStream("a.dat");
                byte[] puffer = new byte[1];
                for(int i=0; (leser.available()!=1);i++){
                        System.out.print(leser.read());
                }

                leser.close();
                } catch(FileNotFoundException e){
                        System.out.println("Keine Datei gefunden");
                }
        }
}