## Uses of Class
java.nio.channels.MembershipKey

- Packages that use MembershipKey
  Package | Description
  --- | ---
  java.nio.channels | Defines channels, which represent connections to entities that are capable of performing I/O operations, such as files and sockets; defines selectors, for multiplexed, non-blocking I/O operations.

- - ### Uses of MembershipKey in java.nio.channels

    Methods in java.nio.channels that return MembershipKey
    Modifier and Type | Method | Description
    --- | --- | ---
    `abstract MembershipKey` | MembershipKey.`block​(InetAddress source)` | Block multicast datagrams from the given source address.
    `MembershipKey` | MulticastChannel.`join​(InetAddress group, NetworkInterface interf)` | Joins a multicast group to begin receiving all datagrams sent to the group, returning a membership key.
    `MembershipKey` | MulticastChannel.`join​(InetAddress group, NetworkInterface interf, InetAddress source)` | Joins a multicast group to begin receiving datagrams sent to the group from a given source address.
    `abstract MembershipKey` | MembershipKey.`unblock​(InetAddress source)` | Unblock multicast datagrams from the given source address that was previously blocked using the `block` method.