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

Packages that use SelectionKey
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.
java.nio.channels.spi: Service-provider classes for the `java.nio.channels` package.

### Uses of SelectionKey in java.nio.channels

Methods in java.nio.channels that return SelectionKey
`abstract SelectionKey` SelectionKey.`interestOps(int ops)` Sets this key's interest set to the given value.
`abstract SelectionKey` SelectableChannel.`keyFor(Selector sel)` Retrieves the key representing the channel's registration with the given selector.
`SelectionKey` SelectableChannel.`register(Selector sel, int ops)` Registers this channel with the given selector, returning a selection key.
`abstract SelectionKey` SelectableChannel.`register(Selector sel, int ops, Object att)` Registers this channel with the given selector, returning a selection key.

Methods in java.nio.channels that return types with arguments of type SelectionKey
`abstract Set<SelectionKey>` Selector.`keys()` Returns this selector's key set.
`abstract Set<SelectionKey>` Selector.`selectedKeys()` Returns this selector's selected-key set.

### Uses of SelectionKey in java.nio.channels.spi

Subclasses of SelectionKey in java.nio.channels.spi
`class` `AbstractSelectionKey` Base implementation class for selection keys.

Methods in java.nio.channels.spi that return SelectionKey
`SelectionKey` AbstractSelectableChannel.`keyFor(Selector sel)`
`SelectionKey` AbstractSelectableChannel.`register(Selector sel, int ops, Object att)` Registers this channel with the given selector, returning a selection key.
`protected abstract SelectionKey` AbstractSelector.`register(AbstractSelectableChannel ch, int ops, Object att)` Registers the given channel with this selector.

Methods in java.nio.channels.spi that return types with arguments of type SelectionKey
`protected Set<SelectionKey>` AbstractSelector.`cancelledKeys()` Retrieves this selector's cancelled-key set.