# java.nio.channels # java.nio.channels ## Interfaces |---------------------------------------------------------------------------------------------------------------------|-----------------------------------------------------------------------------------------| | [AsynchronousByteChannel](https://developer.android.com/reference/kotlin/java/nio/channels/AsynchronousByteChannel) | An asynchronous channel that can read and write bytes. | | [AsynchronousChannel](https://developer.android.com/reference/kotlin/java/nio/channels/AsynchronousChannel) | A channel that supports asynchronous I/O operations. | | [ByteChannel](https://developer.android.com/reference/kotlin/java/nio/channels/ByteChannel) | A channel that can read and write bytes. | | [Channel](https://developer.android.com/reference/kotlin/java/nio/channels/Channel) | A nexus for I/O operations. | | [CompletionHandler](https://developer.android.com/reference/kotlin/java/nio/channels/CompletionHandler) | A handler for consuming the result of an asynchronous I/O operation. | | [GatheringByteChannel](https://developer.android.com/reference/kotlin/java/nio/channels/GatheringByteChannel) | A channel that can write bytes from a sequence of buffers. | | [InterruptibleChannel](https://developer.android.com/reference/kotlin/java/nio/channels/InterruptibleChannel) | A channel that can be asynchronously closed and interrupted. | | [MulticastChannel](https://developer.android.com/reference/kotlin/java/nio/channels/MulticastChannel) | A network channel that supports Internet Protocol (IP) multicasting. | | [NetworkChannel](https://developer.android.com/reference/kotlin/java/nio/channels/NetworkChannel) | A channel to a network socket. | | [ReadableByteChannel](https://developer.android.com/reference/kotlin/java/nio/channels/ReadableByteChannel) | A channel that can read bytes. | | [ScatteringByteChannel](https://developer.android.com/reference/kotlin/java/nio/channels/ScatteringByteChannel) | A channel that can read bytes into a sequence of buffers. | | [SeekableByteChannel](https://developer.android.com/reference/kotlin/java/nio/channels/SeekableByteChannel) | A byte channel that maintains a current*position*and allows the position to be changed. | | [WritableByteChannel](https://developer.android.com/reference/kotlin/java/nio/channels/WritableByteChannel) | A channel that can write bytes. | ## Classes |-------------------------------------------------------------------------------------------------------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | [AsynchronousChannelGroup](https://developer.android.com/reference/kotlin/java/nio/channels/AsynchronousChannelGroup) | A grouping of asynchronous channels for the purpose of resource sharing. | | [AsynchronousFileChannel](https://developer.android.com/reference/kotlin/java/nio/channels/AsynchronousFileChannel) | An asynchronous channel for reading, writing, and manipulating a file. | | [AsynchronousServerSocketChannel](https://developer.android.com/reference/kotlin/java/nio/channels/AsynchronousServerSocketChannel) | An asynchronous channel for stream-oriented listening sockets. | | [AsynchronousSocketChannel](https://developer.android.com/reference/kotlin/java/nio/channels/AsynchronousSocketChannel) | An asynchronous channel for stream-oriented connecting sockets. | | [Channels](https://developer.android.com/reference/kotlin/java/nio/channels/Channels) | Utility methods for channels and streams. | | [DatagramChannel](https://developer.android.com/reference/kotlin/java/nio/channels/DatagramChannel) | A selectable channel for datagram-oriented sockets. | | [FileChannel](https://developer.android.com/reference/kotlin/java/nio/channels/FileChannel) | A channel for reading, writing, mapping, and manipulating a file. | | [FileLock](https://developer.android.com/reference/kotlin/java/nio/channels/FileLock) | A token representing a lock on a region of a file. | | [MembershipKey](https://developer.android.com/reference/kotlin/java/nio/channels/MembershipKey) | A token representing the membership of an Internet Protocol (IP) multicast group. | | [Pipe](https://developer.android.com/reference/kotlin/java/nio/channels/Pipe) | A pair of channels that implements a unidirectional pipe. | | [SelectableChannel](https://developer.android.com/reference/kotlin/java/nio/channels/SelectableChannel) | A channel that can be multiplexed via a[Selector](https://developer.android.com/reference/kotlin/java/nio/channels/Selector). | | [SelectionKey](https://developer.android.com/reference/kotlin/java/nio/channels/SelectionKey) | A token representing the registration of a[SelectableChannel](https://developer.android.com/reference/kotlin/java/nio/channels/SelectableChannel)with a[Selector](https://developer.android.com/reference/kotlin/java/nio/channels/Selector). | | [Selector](https://developer.android.com/reference/kotlin/java/nio/channels/Selector) | A multiplexor of[SelectableChannel](https://developer.android.com/reference/kotlin/java/nio/channels/SelectableChannel)objects. | | [ServerSocketChannel](https://developer.android.com/reference/kotlin/java/nio/channels/ServerSocketChannel) | A selectable channel for stream-oriented listening sockets. | | [SocketChannel](https://developer.android.com/reference/kotlin/java/nio/channels/SocketChannel) | A selectable channel for stream-oriented connecting sockets. | ## Exceptions |-------------------------------------------------------------------------------------------------------------------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | [AcceptPendingException](https://developer.android.com/reference/kotlin/java/nio/channels/AcceptPendingException) | Unchecked exception thrown when an attempt is made to initiate an accept operation on a channel and a previous accept operation has not completed. | | [AlreadyBoundException](https://developer.android.com/reference/kotlin/java/nio/channels/AlreadyBoundException) | Unchecked exception thrown when an attempt is made to bind the socket a network oriented channel that is already bound. | | [AlreadyConnectedException](https://developer.android.com/reference/kotlin/java/nio/channels/AlreadyConnectedException) | Unchecked exception thrown when an attempt is made to connect a[SocketChannel](https://developer.android.com/reference/kotlin/java/nio/channels/SocketChannel)that is already connected. | | [AsynchronousCloseException](https://developer.android.com/reference/kotlin/java/nio/channels/AsynchronousCloseException) | Checked exception received by a thread when another thread closes the channel or the part of the channel upon which it is blocked in an I/O operation. | | [CancelledKeyException](https://developer.android.com/reference/kotlin/java/nio/channels/CancelledKeyException) | Unchecked exception thrown when an attempt is made to use a selection key that is no longer valid. | | [ClosedByInterruptException](https://developer.android.com/reference/kotlin/java/nio/channels/ClosedByInterruptException) | Checked exception received by a thread when another thread interrupts it while it is blocked in an I/O operation upon a channel. | | [ClosedChannelException](https://developer.android.com/reference/kotlin/java/nio/channels/ClosedChannelException) | Checked exception thrown when an attempt is made to invoke or complete an I/O operation upon channel that is closed, or at least closed to that operation. | | [ClosedSelectorException](https://developer.android.com/reference/kotlin/java/nio/channels/ClosedSelectorException) | Unchecked exception thrown when an attempt is made to invoke an I/O operation upon a closed selector. | | [ConnectionPendingException](https://developer.android.com/reference/kotlin/java/nio/channels/ConnectionPendingException) | Unchecked exception thrown when an attempt is made to connect a[SocketChannel](https://developer.android.com/reference/kotlin/java/nio/channels/SocketChannel)for which a non-blocking connection operation is already in progress. | | [FileLockInterruptionException](https://developer.android.com/reference/kotlin/java/nio/channels/FileLockInterruptionException) | Checked exception received by a thread when another thread interrupts it while it is waiting to acquire a file lock. | | [IllegalBlockingModeException](https://developer.android.com/reference/kotlin/java/nio/channels/IllegalBlockingModeException) | Unchecked exception thrown when a blocking-mode-specific operation is invoked upon a channel in the incorrect blocking mode. | | [IllegalChannelGroupException](https://developer.android.com/reference/kotlin/java/nio/channels/IllegalChannelGroupException) | Unchecked exception thrown when an attempt is made to open a channel in a group that was not created by the same provider. | | [IllegalSelectorException](https://developer.android.com/reference/kotlin/java/nio/channels/IllegalSelectorException) | Unchecked exception thrown when an attempt is made to register a channel with a selector that was not created by the provider that created the channel. | | [InterruptedByTimeoutException](https://developer.android.com/reference/kotlin/java/nio/channels/InterruptedByTimeoutException) | Checked exception received by a thread when a timeout elapses before an asynchronous operation completes. | | [NoConnectionPendingException](https://developer.android.com/reference/kotlin/java/nio/channels/NoConnectionPendingException) | Unchecked exception thrown when the[finishConnect](https://developer.android.com/reference/kotlin/java/nio/channels/SocketChannel#finishConnect())method of a[SocketChannel](https://developer.android.com/reference/kotlin/java/nio/channels/SocketChannel)is invoked without first successfully invoking its[connect](https://developer.android.com/reference/kotlin/java/nio/channels/SocketChannel#connect(java.net.SocketAddress))method. | | [NonReadableChannelException](https://developer.android.com/reference/kotlin/java/nio/channels/NonReadableChannelException) | Unchecked exception thrown when an attempt is made to read from a channel that was not originally opened for reading. | | [NonWritableChannelException](https://developer.android.com/reference/kotlin/java/nio/channels/NonWritableChannelException) | Unchecked exception thrown when an attempt is made to write to a channel that was not originally opened for writing. | | [NotYetBoundException](https://developer.android.com/reference/kotlin/java/nio/channels/NotYetBoundException) | Unchecked exception thrown when an attempt is made to invoke an I/O operation upon a server socket channel that is not yet bound. | | [NotYetConnectedException](https://developer.android.com/reference/kotlin/java/nio/channels/NotYetConnectedException) | Unchecked exception thrown when an attempt is made to invoke an I/O operation upon a socket channel that is not yet connected. | | [OverlappingFileLockException](https://developer.android.com/reference/kotlin/java/nio/channels/OverlappingFileLockException) | Unchecked exception thrown when an attempt is made to acquire a lock on a region of a file that overlaps a region already locked by the same Java virtual machine, or when another thread is already waiting to lock an overlapping region of the same file. | | [ReadPendingException](https://developer.android.com/reference/kotlin/java/nio/channels/ReadPendingException) | Unchecked exception thrown when an attempt is made to read from an asynchronous socket channel and a previous read has not completed. | | [ShutdownChannelGroupException](https://developer.android.com/reference/kotlin/java/nio/channels/ShutdownChannelGroupException) | Unchecked exception thrown when an attempt is made to construct a channel in a group that is shutdown or the completion handler for an I/O operation cannot be invoked because the channel group has terminated. | | [UnresolvedAddressException](https://developer.android.com/reference/kotlin/java/nio/channels/UnresolvedAddressException) | Unchecked exception thrown when an attempt is made to invoke a network operation upon an unresolved socket address. | | [UnsupportedAddressTypeException](https://developer.android.com/reference/kotlin/java/nio/channels/UnsupportedAddressTypeException) | Unchecked exception thrown when an attempt is made to bind or connect to a socket address of a type that is not supported. | | [WritePendingException](https://developer.android.com/reference/kotlin/java/nio/channels/WritePendingException) | Unchecked exception thrown when an attempt is made to write to an asynchronous socket channel and a previous write has not completed. |