Hi all, A few colleagues and I were trying to make sense of the joinGroup(SocketAddress, NetworkInterface) <https://github.com/openjdk/jdk/blob/05a764f4ffb8030d6b768f2d362c388e5aabd92d/src/java.base/share/classes/java/net/MulticastSocket.java#L382> method. In particular:
- Why does this take a SocketAddress and then ignores the port in the implementation? Any reason it doesn't take InetAddress, which would make it clear the port is unnecessary? The deprecated overload of joinGroup takes an InetAddress (and is deprecated because it didn't allow specifying the network interface). - The MulticastSocket class javadoc still talks <https://github.com/openjdk/jdk/blob/05a764f4ffb8030d6b768f2d362c388e5aabd92d/src/java.base/share/classes/java/net/MulticastSocket.java#L45> about using joinGroup(InetAddress) as the way to join a group. Should probably be updated to mention the non-deprecated overload. - Also in the class javadoc, there's a "stray" port variable <https://github.com/openjdk/jdk/blob/05a764f4ffb8030d6b768f2d362c388e5aabd92d/src/java.base/share/classes/java/net/MulticastSocket.java#L52> that's not defined anywhere in the example. Since the port is ignored by the joinGroup method, what is this port supposed to represent? Does anyone have any insight into this? Thanks
