Question

im trying to write hashtable between sockets in java
but getting this error :
Error : writing aborted; java.io.NotSerializableException: java.net.Socket

How i can write

EDITED :

 socktmp= mainSocket.accept();
        rdr= new BufferedReader( new InputStreamReader(socktmp.getInputStream()));
        String t="";
        String name=rdr.readLine();

        //rdr.close();
        LstClient.AddClient(name, socktmp);

        objwriter = new ObjectOutputStream(socktmp.getOutputStream());
        objwriter.writeObject(LstClient.clients);
        objwriter.flush();  
        objwriter.close();

Answer 1

You can’t serialise a Socket. You can only serialize HashMaps of objects which are Serializable. Check you are not adding any anonymous or nested classes with implicit references to an Object which holds a Socket.

BTW: Don’t use Hashtable if you can avoid it. Use
HashMap or LinkedHashMap or ConcurrentHashMap instead.