[jdom-interest] help! using ObjectInputStream in applet

[Guy Nirpaz]

Hello,
 
If you're using a browser without plug-in i.e. IExplorer, than the
runtime environment is JDK 1.1. 
Collections (java.util.ArrayList) where introduced starting from JDK
1.2.
You should either build with build1.1, and add the collections.jar to
the jar file loaded by the applet, use 1.2 plug-in as your applet
runtime environment.
 
- Guy

-----Original Message-----
From: Yilin Liu [mailto:g8901 at cs.nccu.edu.tw]
Sent: Thu, June 28, 2001 9:40 AM
To: jdom-interest at jdom.org
Subject: [jdom-interest] help! using ObjectInputStream in applet


hi all, 
    I use ObjectInputStream to read Element object in applet.
    the sample codes is: 
         server: 
                   out = new
ObjectOutputStream(socket.getOutputStream());
                   out.writeObject((new
Element("Test")).addAttribute("hello", "all");
 
         client:   Socket socket = new Socket(host, port);
                  in = new ObjectInputStream(socket.getInputStream());

                   Element value = (Element)in.readObject();
    
    in runtime, I get the exception "java.io.InvalidClassException:
java.util.ArrayList;             
 
IllegalAccessException
 at java/io/ObjectInputStream.initNewObject
 at java/io/ObjectInputStream.readNewObject
 at java/io/ObjectInputStream.readObject
 at com/ms/!!!Internal_Class_0.DefaultReadMethod
 at java/io/ObjectInputStream.invokeDefaultReadObject
 at java/io/ObjectInputStream.defaultReadObject
 at org/jdom/Element.readObject
 at java/io/ObjectInputStream.invokeReadObject
 at java/io/ObjectInputStream.readNewObject
 at java/io/ObjectInputStream.readObject
 at ClientThread.run" in jdom-b7.
    
    please tell me how to solve this problem??
    thanks.