java 聊天应用程序无法在其他机器上运行

Question

我制作了一个基本的聊天应用程序，它可以在同一台 PC 上正常运行，但我希望它也可以在不同的计算机上运行。

为了简单起见，我省略了 GUI 代码。我从一个单独的应用程序接收 IP、名称和端口，该应用程序将其传递给客户端的构造函数。我已输入运行服务器的计算机的 IP 和端口。

客户端

public class ClientGui extends JFrame implements Runnable, KeyListener, ActionListener
{
    private JPanel contentPane;
    private Socket socket;
    private String name , ip;
    private int port;
    private JTextField input;
    private JTextArea console;

    private JButton send;
    private String message;
    private DateFormat format;
    private BufferedReader in;
    private PrintWriter out;
    private String reply;

    public ClientGui(String name, String ip, int port)
    {
        format = DateFormat.getDateTimeInstance(DateFormat.MEDIUM, DateFormat.SHORT);

        this.name = name;
        this.ip = ip;
        this.port = port;

        new Thread(this).start();
    }

    public void run()
    {
        try {
            socket = new Socket(ip, port);
            in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
            out = new PrintWriter(socket.getOutputStream(), true);

            while (true) {
                out.println(name);
                reply = in.readLine();

                if (reply.equals("NAME")) {
                    name = JOptionPane.showInputDialog("Name taken , Enter another");
                } else {
                    input.setEditable(true);
                    setTitle(name);
                    break;
                }
            }

            while (true) {
                reply = in.readLine();

                if (reply.startsWith("MESSAGE")) {
                    log(reply.substring(7));
                }
            }
        } catch (Exception e) {
            try {
                out.close();
                in.close();
                socket.close();
            } catch (Exception e2) {
                dispose();
                System.exit(0);
            }
            dispose();
            System.exit(0);
        }
    }
}

服务器

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.ArrayList;
import java.util.HashSet;

public class Server implements Runnable
{
    private static ArrayList<PrintWriter> writers;
    private static HashSet<String> names;
    private Socket socket;
    private String name;
    private String message;

    public Server(Socket socket)
    {
        this.socket = socket;
    }

    public void run()
    {
        PrintWriter temp = null;

        try (BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream()))) {
            try (PrintWriter out = new PrintWriter(socket.getOutputStream(), true)) {
                while (true) {
                    name = in.readLine();

                    if (names.contains(name)) {
                        out.println("NAME");
                    } else {
                        out.println("NAMEACCEPTED");
                        names.add(name);
                        break;
                    }
                }

                writers.add(out);
                temp = out;

                while(true) {
                    message = in.readLine();

                    for (PrintWriter writer : writers) {
                        writer.println("MESSAGE" + name + " : " + message);
                    }
                }
            }
        } catch (Exception e) {
            try {
                names.remove(name);
                writers.remove(temp);
                socket.close();
            } catch (Exception ignored) {
            }
        }
    }

    public static void main(String[] args)
    {
        writers = new ArrayList<>();
        names = new HashSet<>();
        ServerSocket server = null;

        try {
            int port = Integer.parseInt(args[0]);
            server = new ServerSocket(port);
        } catch (Exception e) {
            System.out.println("Enter a valid port");
            System.exit(0);
        }

        while (true) {
            try {
                System.out.println("Waiting for clients....");
                new Thread(new Server(server.accept())).start();
                System.out.println("Client Received");  
            } catch (Exception e) {
                System.out.println("Server can't accept clients");
                break;
            }
        }
    }
}

Answer 1

我认为可能是这样，因为 1) 您尚未在两台设备上安装正确的 jre 版本 2)您不在同一个网络中或者您没有转发您的IP

您尝试过在虚拟盒子中使用它吗？

(客户端1 == vbox1，服务器==计算机，客户端2 == vbox2)

希望这有帮助