hi shakila,
      try close the outputstream object after you close the input stream object.
      mostly your problem will be solved.


URL urlServlet = new URL 
="http:\\localhost:8080/example/servlet/EchoServlet");
URLConnection con = (URLConnection)urlServlet.openConnection();
con.setDefaultUseCaches (false);
con.setRequestProperty("content-type","application/octet-stream");
Object lo_SendInfoToServlet = new Object();
java.io.ObjectOutputStream lo_OutStream=new java.io.ObjectOutputStream
(con.getOutputStream());
lo_OutStream.writeObject(lo_SendInfoToServlet);
lo_OutStream.flush();

file://Receive from servlet
Object lo_FromServlet = null;
java.io.ObjectInputStream lo_InStream=new 
java.io.ObjectInputStream(con.getInputStream());
lo_FromServlet = lo_InStream.readObject();
lo_InStream.close();
lo_OutStream.close();


 

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