Is it Possible to select the ephemeral port number for any CLient Program in java

When any client program communicates with server client uses an ephemeral port number to communi开发者_如何学Gocate with the server on server port. Is there any way to control/Select the client ephemeral port number in Java.

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Yes, you specify the local address / portnumber:

Socket(InetAddress address, int port, InetAddress localAddr, int localPort)
      Creates a socket and connects it to the specified remote address on the specified remote port.

http://download.oracle.com/javase/6/docs/api/java/net/Socket.html#Socket%28java.net.InetAddress,%20int,%20java.net.InetAddress,%20int%29