Import java.net.url // Represents a unified resource locator
Import java.net.urlConnection // indicates a connection to the URL identity
Import java.net.inetaddress // indicates the host address on the Internet
Import java.net.socket // represents a socket and implements two-way communication between programs
Import java.net.serversocket // represents a server socket
Import java.net.datagrampacket // indicates that the UDP protocol has a data package
Import java.net.datagramsocket // receive data packets between applications
