* gnu/java/nio/DatagramChannelImpl.java
	(DatagramChannelImpl): Made class final.
	(blocking): Made private.
	(socket): Made it a NIODatagramSocket and private.
	(DatagramChannelImpl): create NIODatagramSocket instead of
	DatagramSocket.
	(implConfigureBlocking): Set socket timeout.
	(connect): Check that channel is not closed.
	(write): Implemented.
	(write): Rewritten.
	(read): Implemented.
	(read): Rewritten.
	(receive): Implemented.
	(send): Implemented.
	* gnu/java/nio/SelectionKeyImpl.java
	(readyOps): Made private.
	(interestOps): Made private.
	(impl): Made private.
	(ch): Made private.
	(readyOps): Check if selection key is valid.
	(interestOps): Likewise.
	* gnu/java/nio/SelectorImpl.java
	(closed): Removed.
	(keys): Made private.
	(selected): Made private.
	(finalize): New method.
	(implCloseSelector): Rewritten.
	(keys): Return unmodifiable Set.
	(deregisterCancelledKeys): Fixed typo in method name.
	* gnu/java/nio/SocketChannelImpl.java
	(SocketChannelImpl): Made class final.
	(socket): Made it a NIOSocket and private.
	(blocking): Made private.
	(connected): Made private.
	(connectionPending): New member variable.
	(SocketChannelImpl): New implementation.
	(finalizer): Use isConnected().
	(connect): Rewritten.
	(finishConnect): Throws IOException, implemented.
	(isConnectionPending): Return connectionPending.
	(read): Rewritten.
	(write): Rewritten.
	* gnu/java/nio/NIOConstants.java: New file.
	* Makefile.am (ordinary_java_source_files):
	Added gnu/java/nio/NIOConstants.java.
	* Makefile.in: Regenerated.

From-SVN: r71769