Blocking I/O

The following blocking operations are virtual thread friendly; these methods do not pin the carrier thread when the operation blocks.

API	Blocking Methods	Notes
java.net.Socket	connect, read, write
java.net.ServerSocket	accept
java.net.DatagramSocket/MulticastSocket	receive

java.nio.channels.SocketChannel	connect, read, write	socket adaptor connect, read, and write also okay
java.nio.channels.ServerSocketChannel	accept	socket adaptor accept also okay
java.nio.channels.DatagramChannel	read, receive	socket adaptor receive also okay
java.nio.channels.Pipe.SourceChannel	read
java.nio.channels.Pipe.SinkChannel	write

The following blocking uses the ForkJoinPool.ManagedBocker mechanism to temporarily expand the parallelism until the blocking operation completes.

API	Methods
java.io.File	All file I/O operations
java.io.FileInputStream	open, read, skip
java.io.FileOutputStream	open, write
java.io.RandomAccessFile	open, read, write, seek
java.io.Console	All read, format and PrintStream operations

java.net.InetAddress	All lookup operations

java.nio.MappedByteBuffer	force
java.nio.channels.Selector	All blocking selection operations
java.nio.channels.FileChannel	read, write, lock, truncate, force, transferTo
java.nio.file	All file I/O operations

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