Java + socket Thread

My question is why u hAVE to use thread in socketprogramming....?????

but when u send data over the socket..something is blocking the data and therefore u have use thread in socket i dont know really but i hope u cn answer me...

one of Asnwer is taht u can handle more than one client....


My second is why in java we use gui.thread...??
MaggieshahAsked:
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tbboyettConnect With a Mentor Commented:
The only reason I know of that you would use threads in socket programming is so that your server can start processing a request from one client and at the same time continue listening for other clients to make a request.

Maybe this page can help you understand a little better:
http://java.sun.com/developer/onlineTraining/Programming/BasicJava2/socket.html
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Mayank SConnect With a Mentor Associate Director - Product EngineeringCommented:
That is correct. You need to do both the things parallelly - 1) keep listening for more client connections, 2) handle each client connection parallelly.

See the code sample I posted here to see how a multi-threaded server is developed:

http://www.experts-exchange.com/Programming/Programming_Languages/Java/Q_21757720.html#16084277
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girionisConnect With a Mentor Commented:
> My question is why u hAVE to use thread in socketprogramming....?????

You do not. Unless you want to support multiple clients (look at the comments above).

> but when u send data over the socket..something is blocking the data and therefore u have use thread in socket i dont know really but i hope u cn answer me...

When many requests go to the socket on the server all these requests are queued at the port (so the server accepts connections sequentially). In order to serve them all you create a new thread (on the server) for each client connection you accept. For more information: http://java.sun.com/docs/books/tutorial/networking/sockets/clientServer.html

> My second is why in java we use gui.thread...??

There is no such package. I guess you mean why many times you need threads when you have GUI in the same programme? This is done because all the handling of the GUI functionallity (drawing, responding to user input etc) should be done in the event-dispatching thread and not in the main thread. for more information: http://java.sun.com/products/jfc/tsc/articles/threads/threads1.html
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kaliyugkaarjunConnect With a Mentor Commented:
> why u hAVE to use thread in socketprogramming....?????

I think u shud use java NIO...if u want to support multiple clients then threading may be required..but to avoid blocking of data..go for java nonblocking I/O

http://java.sun.com/j2se/1.4.2/docs/guide/nio/
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