try
{
 fis = new FileInputStream("filename.ser");
 ois = new ObjectInputStream(fis);
 Object obj = null;

 try
 {
  while(true)
   obj = ois.readObject();
 }
 catch(EOFException eof)
 {
  //end of file reached, do nothing
 }
}
finally
{
 if (ois != null)
  ois.close();

 if (fis != null)
  fis.close();
}