What does wildcard address in InetSocketAddress mean?
In the docs for the constructor InetSocketAddress(int port) it says:
Creates a socket address where the IP address is the wildcard address and the port number a specified value.
What does a wildcard address do and what does it means when used in socket.bind()?
From the docs: The wildcard is a special local IP address. It usually means "any" and can only be used for bind operations.
The value of this IP address is 0.0.0.0. If you have two network adapters, one with IP address 1.1.1.1 and one with IP address 2.2.2.2, then you can create a listening socket and bind it to 1.1.1.1 so that the socket will not bind to 2.2.2.2. You can also create a listening socket and bind it to 2.2.2.2, so that it will not bind to 1.1.1.1. If you do not care and want your socket to bind to all network cards, then you bind it to the wildcard address.
Another special value would be 127.0.0.1, meaning that only clients on the same computer could connect to your server.
郑重声明：本站内容如果来自互联网及其他传播媒体，其版权均属原媒体及文章作者所有。转载目的在于传递更多信息及用于网络分享，并不代表本站赞同其观点和对其真实性负责，也不构成任何其他建议。
