server.java

java的重要部分

// Server.java

/**
 * This a Socket Server program
 * @version 1.0 1999/12/27
 * @author Huang Jian-chang
**/

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

public class Server
{
	ServerSocket  server; 
	DataOutputStream   output;
	Socket  socket;
	public Server (){
		try{
		    	// create a server on port 5000
	                server=new ServerSocket(5000);
			// display interactive informaion
			System.out.println("Server created.");
			System.out.println("waiting for client to connect on...");
			// waiting for client to connect on...
			socket = server.accept();
                        // client connected
                        System.out.println("client connected.\nShutdown!");  
			output = new DataOutputStream(socket.getOutputStream());
			output.writeUTF("Welcome to Server.Bye!");
                        output.close();
			server.close();		    	
		}
		catch(SocketException e){
			System.out.println(e.toString());
			e.printStackTrace();
			System.exit(1);
		}
		catch(IOException e){
			System.out.println(e.toString());
			e.printStackTrace();
			System.exit(1);
		}		
	}

       public static void main(String args[]){
		Server game=new Server();
	}
}