Java Network Programming (vi) communication using a non-connected datagram (UDP)

Communicate using a non-connected datagram (UDP)

What is datagram?

The datagram is an independent packet transmitted on the Internet, whether the datagram can reach the destination correctly, the time of arrival, the order and the correctness of the content are not guaranteed.

Datagram and datagrampacket classes are used in Java.

The Datagramsocket class uses the UDP protocol to implement a client-server socket.

　　

Send () sends datagrams.

Receive () Receives datagrams.

　　

　　You can use the example of letter letters to compare UDP communication.

At this point datagrampacket is the equivalent of a letter wrapped in an envelope. After filling in the address and the recipient, you can send it out.

A simple example of UDP communication

Java Network Programming (vi) communication using a non-connected datagram (UDP)