请问如何测试程序是否实现了非阻塞？java.nio的ServerSocketChannel一次可以同时接收多个SocketChannel吗?

windows下面socket非组赛其实也就是winsock api的调用而已，比如我用的delphi:

var
addr : TSockAddr;
sock : TSocket;

sock := socket( AF_INET, SOCK_STREAM, IPPROTO_TCP );
addr.sin_family := AF_INET;
addr.sin_port := htons(5678);
addr.sin_addr.S_addr := htonl(INADDR_ANY);
bind( m_sock, @addr, sizeof(SOCKADDR) );

WSAAsyncSelect( m_sock, Handle, WM_SOCKET, FD_ACCEPT or FD_CLOSE ); // 这就是组赛了

listen( m_sock, 5 );
....