DatagramSocket的发送方法是异步的吗？

Question

What does it mean that DatagramSocket send operation/method is asynchronous? That it is not waiting for client to receive datagrams?
I suppose that opposite example is TCP communication where we have connection and guaranted delivery of data.

Add:
The exact sentence in question is: "Send operation is asynchronous and reading operation is blocking."
Relating to send and receive methods of DatagramSocket class.

Answer 1

There's nothing in the javadocs that says this method (or any method of this class) is asynchronous. When this method returns, the packet has been queued up to send by the OS.