如何从单个套接字连续发送和接收数据报包。

Question

我想从同一端口发送和接收datagrampacket。 应该使用相同的套接字发送数据包和接收数据包。 如果我发送它，则它不能同时接收传入的数据包。 如何同步从单个端口发送和接收数据包？

Answer 1

您可以尝试以下操作：

    DatagramSocket serverSocket = new DatagramSocket(9876);             
    byte[] receiveData = new byte[1024];             
    byte[] sendData = new byte[1024]; 

    //receiving:
    DatagramPacket receivePacket = new DatagramPacket(receiveData, receiveData.length);
    serverSocket.receive(receivePacket);

    InetAddress callerIPAddress = receivePacket.getAddress();                   
    int callerPort = receivePacket.getPort();

    //sending:  
    sendData = "ciao".getBytes();
    DatagramPacket sendPacket =  new DatagramPacket(sendData, sendData.length, callerIPAddress, callerPort);
    serverSocket.send(sendPacket);