public class Test { 

    public static void main(String[] args) { 
        System.out.println(read(3,9));
    } 
    public static String read(int from ,int to){
        String result="";
        byte[] result2=new byte[to-from+1];
        try{
            FileInputStream fis=new FileInputStream("d:\\ss.txt");
            BufferedInputStream bis=new BufferedInputStream(fis);
             bis.skip(from-1);
            bis.read(result2, 0, to-from+1);
        }catch(FileNotFoundException e){
            e.printStackTrace();
        }catch(IOException e){
            e.printStackTrace();
        }
        return new String(result2);
    }
}