i use object-base communication between applet and servlet for reading data. when i use this code for using JTable, my applet doesn't appear.
is while((aa.getfirstname())!=null) is incorrect?
thanks very much.

 Object[][] data = new Object[100][7];
              user aa = (user)inputFromServlet.readObject();

              int row=0;
            while((aa.getfirstname())!=null){
                 data[row][0]=aa.getfirstname();
                 data[row][1]=aa.getlastname();
                 data[row][2]=aa.getusername();
                 data[row][3]=aa.getpassword();
                 data[row][4]=aa.getemail();
                 data[row][5]=aa.getaddress();
                 data[row][6]=aa.getgrade();
                 aa = (user)inputFromServlet.readObject();
             row++;
           }
           inputFromServlet.close();