example5connectionacceptor.java

JAVA分布式程序学习的课件（全英文）

import java.net.*;
import java.io.*;

/**
 * This example illustrates the basic syntax for stream-mode
 * socket.
 * @author M. L. Liu
 */
public class Example5ConnectionAcceptor {

// An application which receives a message using stream-mode socket
// Two command line arguments are expected, in order: 
//    <port number for the the Server socket used in this process>
//    <message, a string, to send>

   public static void main(String[] args) {
      if (args.length != 2)
         System.out.println
            ("This program requires three command line arguments");
      else {
         try {
  		      int portNo = Integer.parseInt(args[0]);
            String message = args[1];
            // instantiates a socket for accepting connection  	
   	      ServerSocket connectionSocket = new ServerSocket(portNo);
/**/        System.out.println("now ready accept a connection");  
            // wait to accept a connecion request, at which
            //  time a data socket is created                  
            MyStreamSocket dataSocket =  
               new MyStreamSocket(connectionSocket.accept());
/**/        System.out.println("connection accepted"); 
            dataSocket.sendMessage(message);

/**/        System.out.println("message sent"); 
            dataSocket.close( );
/**/        System.out.println("data socket closed");
            connectionSocket.close( );
/**/        System.out.println("connection socket closed"); 
         } // end try
	      catch (Exception ex) {
           ex.printStackTrace( );
	      } // end catch
      } // end else
   } // end main
} // end class