// tcpServer.java by fpont 3/2000// usage : java tcpServer <port number>.// default port is 1500.// connection to be closed by client.// this server handles only 1 connection.import java.net.*;import java.io.*;public class tcpServer {        public static void main(String args[]) {		int port;	ServerSocket server_socket;	BufferedReader input;		try { 	    port = Integer.parseInt(args[0]);	}	catch (Exception e) {	    System.out.println("port = 1500 (default)");	    port = 1500;	}	try {	    	    server_socket = new ServerSocket(port);	    System.out.println("Server waiting for client on port " + 			       server_socket.getLocalPort());	    	    // server infinite loop	    while(true) {		Socket socket = server_socket.accept();		System.out.println("New connection accepted " +				   socket.getInetAddress() +				   ":" + socket.getPort());		input = new BufferedReader(new InputStreamReader(socket.getInputStream())); 		// print received data 		try {		    while(true) {			String message = input.readLine();			if (message==null) break;			System.out.println(message);		    }		}		catch (IOException e) {		    System.out.println(e);		}				// connection closed by client		try {		    socket.close();		    System.out.println("Connection closed by client");		}		catch (IOException e) {		    System.out.println(e);		}			    }	    	    	}		catch (IOException e) {	    System.out.println(e);	}    }}