echoclient.java

java应用开发详解

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

public class EchoClient 
{
    public static void main(String[] args) throws IOException 
    {	
        Socket echoSocket = null;
        PrintWriter out = null;
        BufferedReader in = null;

        try 
        {
            echoSocket = new Socket ( "localhost", 1111); 
            out = new PrintWriter(echoSocket.getOutputStream(), true);
            in = new BufferedReader(new InputStreamReader(echoSocket.getInputStream()));
        } 
        catch (UnknownHostException e) 
        {
            System.err.println("Don't know about host: localhost.");
            System.exit(1);
        } 

      
	System.out.println(in.readLine());
	System.out.println(in.readLine());
	
	BufferedReader stdIn = new BufferedReader(
                                   new InputStreamReader(System.in));
	String userInput;

	while ((userInput = stdIn.readLine()) != null) {
	    out.println(userInput);
	    System.out.println(in.readLine());
	}

	
	out.close();
	in.close();
	
	echoSocket.close();
    }
}