1+ package sporadic .socket_programming ;
2+
3+ import java .io .DataInputStream ;
4+ import java .io .DataOutputStream ;
5+ import java .io .IOException ;
6+ import java .net .ServerSocket ;
7+ import java .net .Socket ;
8+ import java .net .SocketTimeoutException ;
9+
10+ // TODO: this program not working yet, make it work or start from scratch to write another socket
11+ // program to better understand socket.
12+
13+ /**
14+ * Compile client and server and then start server as follows:
15+ *
16+ * $ java GreetingServer 6066 Waiting for client on port 6066... Check client
17+ * program as follows:
18+ *
19+ * $ java GreetingClient localhost 6066 Connecting to localhost on port 6066
20+ * Just connected to localhost/127.0.0.1:6066 Server says Thank you for
21+ * connecting to /127.0.0.1:6066 Goodbye!
22+ *
23+ * But it's not working as above, running from Eclipse and from terminal,
24+ * neither worked. I'll have to figure out why it didn't work and make it work
25+ * in the future./
26+ *
27+ * /** The following GreetingServer program is an example of a server
28+ * application that uses the Socket class to listen for clients on a port number
29+ * specified by a command-line argument:
30+ */
31+ public class GreetingServer extends Thread {
32+ private ServerSocket serverSocket ;
33+
34+ public GreetingServer (int port )throws IOException {
35+ serverSocket =new ServerSocket (port );
36+ serverSocket .setSoTimeout (10000 );
37+ }
38+
39+ public void run () {
40+ while (true ) {
41+ try {
42+ System .out .println ("Waiting for client on port "
43+ +serverSocket .getLocalPort () +"..." );
44+ Socket server =serverSocket .accept ();
45+ System .out .println ("Just connected to "
46+ +server .getRemoteSocketAddress ());
47+ DataInputStream in =new DataInputStream (
48+ server .getInputStream ());
49+ System .out .println (in .readUTF ());
50+ DataOutputStream out =new DataOutputStream (
51+ server .getOutputStream ());
52+ out .writeUTF ("Thank you for connecting to "
53+ +server .getLocalSocketAddress () +"\n Goodbye!" );
54+ server .close ();
55+ }catch (SocketTimeoutException s ) {
56+ System .out .println ("Socket timed out!" );
57+ break ;
58+ }catch (IOException e ) {
59+ e .printStackTrace ();
60+ break ;
61+ }
62+ }
63+ }
64+
65+ public static void main (String []args ) {
66+ int port =Integer .parseInt (args [0 ]);
67+ try {
68+ Thread t =new GreetingServer (port );
69+ t .start ();
70+ }catch (IOException e ) {
71+ e .printStackTrace ();
72+ }
73+ }
74+ }