如何在java的udp(客户端,服务器)程序中设置客户端的端口号?
每次运行客户端时,服务器都会告诉我一个不同的端口号。我对此进行了搜索,发现当我将端口设置为零时,它会查找可用的端口,但我将其更改为我想要的编号如何在java的udp(客户端,服务器)程序中设置客户端的端口号?,java,sockets,network-programming,udp,serversocket,Java,Sockets,Network Programming,Udp,Serversocket,每次运行客户端时,服务器都会告诉我一个不同的端口号。我对此进行了搜索,发现当我将端口设置为零时,它会查找可用的端口,但我将其更改为我想要的编号publicstaticfinal int MYPORT=5555并且每次仍从服务器获取一个新端口号 这是打印方法: System.out.printf(" using port %d\n", receivePacket.getPort()); DatagramSocket socket = new DatagramSocket(null); Socke
publicstaticfinal int MYPORT=5555代码>并且每次仍从服务器获取一个新端口号
这是打印方法:
System.out.printf(" using port %d\n", receivePacket.getPort());
DatagramSocket socket = new DatagramSocket(null);
SocketAddress localBindPoint = new InetSocketAddress(MYPORT); socket.bind(localBindPoint);
SocketAddress remoteBindPoint = new InetSocketAddress(args[0], Integer.valueOf(args[1]));
我想你没抓住重点,这段代码在端口5555上听:
下面代码中的istructionpacket.getPort()
返回远程主机上的端口号,此数据报将发送到远程主机或从远程主机接收数据报
int MYPORT = 5555;
DatagramSocket dsocket = new DatagramSocket(MYPORT);
byte[] buffer = new byte[2048];
// Create a packet to receive data into the buffer
DatagramPacket packet = new DatagramPacket(buffer, buffer.length);
while (true) {
// Wait to receive a datagram
dsocket.receive(packet);
// Convert the contents to a string, and display them
String msg = new String(buffer, 0, packet.getLength());
System.out.println(packet.getAddress().getHostName() + ": "
+ msg);
// Reset the length of the packet before reusing it.
packet.setLength(buffer.length);
System.out.printf(" using port %d\n", packet.getPort());
}
我在当地仔细检查了一下:
sudo lsof -iUDP -n -P | grep 5555
java 1606 freedev 5u IPv6 0x9ed7290ce134656f 0t0 UDP *:5555
尝试发布(并缩进)代码中更相关的部分。将其添加到您的帖子中,而不是添加到注释中:)它已被编辑,您知道答案吗?我添加了一个代码示例,解释如何在端口5555
上收听。你有什么:Mac,Linux,Windows?