1. Description
SocketChannel represents the socket channel, and the instance is created through its static method.
SocketChannel is a subclass of SelectableChannel. If the blocking mode is not configured, the SocketChannel object defaults to blocking mode, and the open(SocketAddressremote) method actually blocks the opening of the server connection. Any I/O operation on SocketChannel is blocking.
2. Example
public static SocketChannel open() throws IOException {
return SelectorProvider.provider().openSocketChannel();
}
public static SocketChannel open(SocketAddress remote)
throws IOException
{
// 1. ceate socket channel
SocketChannel sc = open();
try {
// 2. connect channel's socket, blocking until connected or error
sc.connect(remote);
} catch (Throwable x) {
try {
sc.close();
} catch (Throwable suppressed) {
x.addSuppressed(suppressed);
}
throw x;
}
assert sc.isConnected();
return sc;
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