knockknockclient.java

精通java核心技术》随书源代码

// ==================== Program Discription =====================
// 程序名称：示例12-8: KnockKnockClient.java
// 程序目的：客户端源程序
//=========================================================
import java.io.*;
import java.net.*;

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

        try {
            kkSocket = new Socket("hostname", 4444);
            out = new PrintWriter(kkSocket.getOutputStream(), true);
            in = new BufferedReader(new InputStreamReader(kkSocket.getInputStream()));
        }
        catch (UnknownHostException e) {
            System.err.println("Don't know about host: taranis.");
            System.exit(1);
        }
        catch (IOException e) {
            System.err.println("Couldn't get I/O for the connection to: biao.");
            System.exit(1);
        }

        BufferedReader stdIn = new BufferedReader(new InputStreamReader(System.in));
        String fromServer;
        String fromUser;

        while ((fromServer = in.readLine()) != null) 
        {
            System.out.println("Server: " + fromServer);
            if (fromServer.equals("Bye."))
                break;
		    
            fromUser = stdIn.readLine();
            if (fromUser != null) {
                System.out.println("Client: " + fromUser);
                out.println(fromUser);
	            }
        }

        out.close();
        in.close();
        stdIn.close();
        kkSocket.close();
    }
}