CODEWITHSUNDEEP
javasockets
Tysia Krepps
Tysia Krepps

Reputation: 39

Server/Client sockets and ObjectOutputStream

Server:

   Socket client_socket = server_back_end.server_socket.accept(); //1.

   ClientInfo new_client = new ClientInfo(
    new ObjectOutputStream(client_socket.getOutputStream()), //writer
    new ObjectInputStream(client_socket.getInputStream()),   //reader
    "blah, about to be re-written"
  );

 new_client.user_name = (String) new_client.reader.readObject(); //3. "bob"
 //new_client.user_name = new_client.reader.readLine(); //this doesnt work either

 System.out.println("Client " + new_client.user_name + " has connected.");

Client:

Socket client_socket = new Socket();
client_socket.connect(new InetSocketAddress(server_ip, server_port), 500);
client_front_end.display("<<Connection Successful.>>\n");

String user_name = txtfield.getText(); //"bob"

client = new ClientInfo(
   new ObjectOutputStream(client_socket.getOutputStream()), //writer
   new ObjectInputStream(client_socket.getInputStream()),   //reader
   user_name);

client.writer.writeChars(client.user_name); //2.

I first run the server code. When I step through the debugger on the server side, "//1." executes, and waits for a client to connect.

Then I run the client code. What I expect to happen is "//2." should call "//3." in the server code, pick up the name, and print that the user has connected. But the ObjectOutputStream.writeChars(client.user_name) is not triggering the read in the server. What am I doing wrong? My goal is to successfully print the name from the client using these ObjectOutput/ObjectInput streams

Upvotes: 0

Views: 49

Answers (1)

user207421
user207421

Reputation: 311052

You're reading an object but you aren't writing an object. You're writing chars. readObject() can only read the output of writeObject(). readInt() can only read the output of writeInt(). And so on.

Upvotes: 1

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