java - Android发送套接字: What is the difference between these two methods for initializing a socket?

Question

方法一:

InetAddress addr = InetAddress.getByName("192.168.0.101");
int port = 18250;
Socket socket = new Socket(addr, port);

方法二:

Socket socket = new Socket("192.168.0.101",18250);

Answer 1

它们是一样的:

Java 源代码:

public
class Socket {

...

    public Socket(String host, int port)
    throws UnknownHostException, IOException
    {
    this(host != null ? new InetSocketAddress(host, port) :
         new InetSocketAddress(InetAddress.getByName(null), port),
         (SocketAddress) null, true);
    }


    public Socket(InetAddress address, int port) throws IOException {
    this(address != null ? new InetSocketAddress(address, port) : null, 
         (SocketAddress) null, true);
    }

...
}