# Uses of Interface
java.nio.channels.CompletionHandler

Packages that use CompletionHandler
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 CompletionHandler in java.nio.channels

Methods in java.nio.channels with parameters of type CompletionHandler
Modifier and Type
Method
Description
`abstract <A> void`
AsynchronousServerSocketChannel.`accept(A attachment, CompletionHandler<AsynchronousSocketChannel,? super A> handler)`
Accepts a connection.
`abstract <A> void`
AsynchronousSocketChannel.`connect(SocketAddress remote, A attachment, CompletionHandler<Void,? super A> handler)`
Connects this channel.
`abstract <A> void`
AsynchronousFileChannel.`lock(long position, long size, boolean shared, A attachment, CompletionHandler<FileLock,? super A> handler)`
Acquires a lock on the given region of this channel's file.
`final <A> void`
AsynchronousFileChannel.`lock(A attachment, CompletionHandler<FileLock,? super A> handler)`
Acquires an exclusive lock on this channel's file.
`<A> void`
AsynchronousByteChannel.`read(ByteBuffer dst, A attachment, CompletionHandler<Integer,? super A> handler)`
Reads a sequence of bytes from this channel into the given buffer.
`abstract <A> void`
AsynchronousFileChannel.`read(ByteBuffer dst, long position, A attachment, CompletionHandler<Integer,? super A> handler)`
Reads a sequence of bytes from this channel into the given buffer, starting at the given file position.
`abstract <A> void`
AsynchronousSocketChannel.`read(ByteBuffer[] dsts, int offset, int length, long timeout, TimeUnit unit, A attachment, CompletionHandler<Long,? super A> handler)`
Reads a sequence of bytes from this channel into a subsequence of the given buffers.
`abstract <A> void`
AsynchronousSocketChannel.`read(ByteBuffer dst, long timeout, TimeUnit unit, A attachment, CompletionHandler<Integer,? super A> handler)`
Reads a sequence of bytes from this channel into the given buffer.
`final <A> void`
AsynchronousSocketChannel.`read(ByteBuffer dst, A attachment, CompletionHandler<Integer,? super A> handler)`
`<A> void`
AsynchronousByteChannel.`write(ByteBuffer src, A attachment, CompletionHandler<Integer,? super A> handler)`
Writes a sequence of bytes to this channel from the given buffer.
`abstract <A> void`
AsynchronousFileChannel.`write(ByteBuffer src, long position, A attachment, CompletionHandler<Integer,? super A> handler)`
Writes a sequence of bytes to this channel from the given buffer, starting at the given file position.
`abstract <A> void`
AsynchronousSocketChannel.`write(ByteBuffer[] srcs, int offset, int length, long timeout, TimeUnit unit, A attachment, CompletionHandler<Long,? super A> handler)`
Writes a sequence of bytes to this channel from a subsequence of the given buffers.
`abstract <A> void`
AsynchronousSocketChannel.`write(ByteBuffer src, long timeout, TimeUnit unit, A attachment, CompletionHandler<Integer,? super A> handler)`
Writes a sequence of bytes to this channel from the given buffer.
`final <A> void`
AsynchronousSocketChannel.`write(ByteBuffer src, A attachment, CompletionHandler<Integer,? super A> handler)`