import java.io.*;

       public  class  ReadFileDemo
       {
   		   public static void main(String arg[])  throws IOException
	        {
			   byte buffer[]=new byte[8];
	    	 	   FileInputStream in = new FileInputStream("data.tmp");
	     	   if ( in != null )
		 	   {
				   in.read( buffer );
				   String str = new String( buffer,0 );
				   System.out.println( "read file data:" + str );
				   in.close();
	        	   }			
	    	    }
	  }