为什么服务器在此程序中没有响应？客户端服务器Java

Question

我正在观看客户端服务器java教程，其中导师正在开发一个聊天应用程序。在包上有两个文件夹。在一个文件夹中，有登录ui（代码），客户端连接和主类。在另一个文件夹中有服务器连接，服务器客户端连接（在此类中包括以唯一方式识别客户端，导师使用一个客户端的随机生成号）和主类。

当我运行应用程序UI时，但是在控制台服务器和客户端输出中没有显示。这是我的客户代码。

public class Client extends javax.swing.JFrame { 
private String name,address;
private int port;
private DatagramSocket socket;
private InetAddress ip;
private Thread send;
    public Client()
{

}

public Client(String name,String address, int port) {
    this.name=name;
    this.address=address;
    this.port=port;
    initComponents();
    boolean connect = openConnection(address);
if(!connect){
    System.err.println("Connection failed!");
    console("Connection failed!");
}
console("Attempting to connection to"+ address+":"+port+",user:"+name);
String connection = "/c/"+name;
send(connection.getBytes());
    }

private boolean openConnection(String address){
    try{
        socket =new DatagramSocket();
        ip = InetAddress.getByName(address);
    }catch(UnknownHostException e){
        e.printStackTrace();
        return false;
    }catch(SocketException e){
        e.printStackTrace();
        return false;
    }
    return true;
}

//receive packets part //
private String receive(){
    byte[]data=new byte[1024];
    DatagramPacket packet = new DatagramPacket(data,data.length);
    try{
        socket.receive(packet);
    }catch(IOException e){
        e.printStackTrace();
    }
    String message =new String(packet.getData());
    return message;

}

        //send data
        private void send(final byte[] data){
            send = new Thread("send"){
            public void run(){
                DatagramPacket packet = new DatagramPacket (data,data.length,ip,port);
                try{
                    socket.send(packet);
                }catch(IOException e){
                    e.printStackTrace();
                }
            }
    };

    send.start();
    }


private void send(String message){
    if(message.equals(""))
    return;
    message= name+":"+message;
    console(message);
    send(message.getBytes());
    txtMessage.setText("");

}

服务器类（包含在sperate文件夹中）

public class Server implements Runnable {

    private List<ServerClient> clients = new ArrayList<ServerClient>();

private DatagramSocket socket;
private int port;
private boolean running = false;
private Thread run, manage, send, receive;

public Server(int port) {
    this.port = port;
    try {
        socket = new DatagramSocket(port);
    } catch (SocketException e) {
        e.printStackTrace();
        return;
    }
    run = new Thread(this, "Server");
    run.start();
}

public void run() {
    running = true;
    System.out.println("Server started on port " + port);
    manageClients();
    receive();
}

private void manageClients() {
    manage = new Thread("Manage") {
        public void run() {
            while (running) {
                // Managing
            }
        }
    };
    manage.start();
}

private void receive() {
    receive = new Thread("Receive") {
        public void run() {
            while (running) {
                byte[] data = new byte[1024];
                DatagramPacket packet = new DatagramPacket(data, data.length);
                try {
                    socket.receive(packet);
                } catch (IOException e) {
                    e.printStackTrace();
                }
                String string = new String(packet.getData());
                System.out.println(string);
            }
        }
    };
    receive.start();
}

    private void process(DatagramPacket packet){
            String string = new String(packet.getData());
            if(string.startsWith("/c/")){
                UUID id= UUID.randomUUID();
                System.out.println(id.toString());
                clients.add(new ServerClient(string.substring(3,string.length()),packet.getAddress(),packet.getPort(),50));
                System.out.println(string.substring(3,string.length()));
        }else{
                System.out.println(string);
                }
        }

在教程中，教师在没有main方法的情况下运行此服务器代码。但它不会在netbeans中运行。

在Server类包main方法

中

public class ServerMain {
    private int port;
    private Server server;

    public ServerMain(int port){
        this.port=port; 
        server = new Server(port);
    }
  public static void main(String[] args){
      int port;
      if(args.length!=1){
      System.out.println("Usage: java-jar MyChat.jar[port]");
      return;
}
      port=Integer.parseInt(args[0]);
      new ServerMain(port);
}

在客户端聊天包主要方法中。

public class YakaaChat {

/**
 * @param args the command line arguments
 */
public static void main(String[] args) {
    // TODO code application logic here
}
}