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下面是一个简单的套接字级程序。建立连接后，只要消息没有在一段时间内结束，服务器就可以说只要他/她想要的时间 - 然后客户端可以说只要他/她想要的时间，前提是会话不会以期间——对话就这样交替进行，直到有人关闭程序——

直到有一个时期部分我才能得到......否则，我不会有问题 - 会有一对一的互动

一旦一个人写了，就永远轮到他们了……

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

public class ChatterServer {

    final static int SERVER_PORT = 3333;
    public static void main(String [] args) throws Exception {

        ServerSocket serverSocket = new ServerSocket(SERVER_PORT); 
        System.err.println("Waiting for a client");
        Socket clientSocket = serverSocket.accept();

        System.out.println("Connection requested from: " + clientSocket.getLocalAddress());

        PrintStream toClient = new PrintStream(clientSocket.getOutputStream(), true);
        BufferedReader fromClient = new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));
        BufferedReader keyboard = new BufferedReader(new InputStreamReader(System.in));

        toClient.println("Whatcha want?"); 
        String incoming = fromClient.readLine();

        while(incoming != null) {

            System.out.println(incoming);
            System.out.print("Your turn>"); 
            String myReply="";

            //this part does not work
            while ( myReply.substring( myReply.length() ) .equals(".") == false){

                myReply = keyboard.readLine(); 
                toClient.println(myReply); 
            }

            incoming = fromClient.readLine();
        }
    }
}

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

public class ChatterClient {
    final static int SERVER_PORT = 3333;
    public static void main(String [] args) throws Exception {

        Socket serverSocket = new Socket(args[0], SERVER_PORT);
        PrintStream toServer =
                new PrintStream(serverSocket.getOutputStream(), true);
        BufferedReader fromServer = new BufferedReader(new InputStreamReader(serverSocket.getInputStream()));
        BufferedReader keyboard = new BufferedReader(new InputStreamReader(System.in));

        String incoming = fromServer.readLine();

        while(incoming != null) { 
            System.out.println(incoming);
            System.out.print("Your turn>"); 
            String myReply="";

            while ( myReply.substring( myReply.length() ) .equals(".") == false){
                myReply = keyboard.readLine(); 
                toServer.println(myReply); 
            }//end while

            incoming = fromServer.readLine();
        }//end while
    }//end main

}//end ChatterClient class
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2 回答 2

2

最好使用该endsWith方法。它会工作得很好，而且看起来更干净。

 while (!myReply.endsWith(".")){...}
于 2013-05-17T22:59:06.623 回答
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虽然我同意String.endsWith在代码中使用实际问题，但它someString.substring(someString.length())始终是一个空字符串。你想要someString.substring(someString.length()-1)。

于 2013-05-17T23:16:09.383 回答