AsynchronousSocketChannelImpl.java 文件源码

@Override
public final <T> AsynchronousSocketChannel setOption(SocketOption<T> name, T value)
    throws IOException
{
    if (name == null)
        throw new NullPointerException();
    if (!supportedOptions().contains(name))
        throw new UnsupportedOperationException("'" + name + "' not supported");

    try {
        begin();
        if (writeShutdown)
            throw new IOException("Connection has been shutdown for writing");
        if (name == StandardSocketOptions.SO_REUSEADDR &&
                Net.useExclusiveBind())
        {
            // SO_REUSEADDR emulated when using exclusive bind
            isReuseAddress = (Boolean)value;
        } else {
            Net.setSocketOption(fd, Net.UNSPEC, name, value);
        }
        return this;
    } finally {
        end();
    }
}