java - 尝试让 java 套接字程序工作，但得到 "java.net.BindException: Address already in use 6666 "

Question

这是代码

我已经写了一个服务器和客户端。但是当我运行它们时(正如您在上一个程序中看到的那样)，我收到以下错误:

哎呀! java.net.BindException:地址已在使用 6666 6666 是端口号。我指定了。

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

public class processSendHelper
{
    Process p;
    String address;
    int port;
    long msg_data;

    processSendHelper(int pid, int current_round, long address, long msg_data, int port)
    {
        try
        {
            ServerSocket sSoc = new ServerSocket(port);

                Socket inSoc = sSoc.accept();
                msg_Thread msgT = new msg_Thread(inSoc, msg_data);
                msgT.start();
                Thread.sleep(5000);
                sSoc.close();

        }
        catch(Exception e)
        {
            System.out.println("Whoop  s! " + e.toString());
        }

    }

}

/* sends out (or rather just makes available) the provided msg 
 * */
class msg_Thread extends Thread 
{

    Socket threadSoc;
    long msg_data;

    msg_Thread (Socket inSoc, long msg_data) 
    {
        threadSoc = inSoc;
        this.msg_data = msg_data;
    }

    public void run()
    {
        try 
        {
              PrintStream SocOut = new
              PrintStream(threadSoc.getOutputStream());
              SocOut.println(msg_data);
        }

        catch (Exception e)
        {
            System.out.println("Whoops!" + e.toString());
        }

        try 
        {
            threadSoc.close();
        }
        catch (Exception e) 
        {
            System.out.println("Oh no! " +
            e.toString());
        }
    }
}





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


public class processReceiveHelper 
{
        Socket appSoc;
        BufferedReader in;
        String message;
        String host;
        int port;

        processReceiveHelper(String host,int port) 
        {
            try 
            {
                appSoc = new Socket(host,port);
                in = new BufferedReader(new InputStreamReader(appSoc.getInputStream()));
                message = in.readLine();
                System.out.println(message); 
                    /* Tokenizer code comes here 
                     * Alongwith the code for 
                     * updating the process object's
                     * data
                     * */

            }
            catch (Exception e) 
            {
                System.out.println("Died... " +
                e.toString());
            }

        }
}




public class Orchestrator 
{



    public static void main(String[] args)
    {
        processSendHelper psh = new processSendHelper(1, 2, 1237644, 6666, 2002);
        processReceiveHelper prh = new processReceiveHelper("localhost", 2002);

    }
}

编辑:

我发现了问题。原因是我从同一个主程序运行服务器和客户端。

以下工作有效:

Answer 1

这意味着已经有一个应用程序在端口 6666 上运行，阻止您的 Java 应用程序使用它。然而，同样可能的是，您的 Java 应用程序的正在运行的进程仍然保留在 6666 上。终止任何正在运行的 java 进程并尝试重新运行代码 - 如果仍然失败，那么您有其他应用程序使用 6666，您会更好使用不同的端口。