[JAVA] UDP Library - Regarding the 'multicast address' setting

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[JAVA] UDP Library - Regarding the ‘multicast address’ setting

Hello.

It is related to the ‘UDP’ library.
link : hypermedia.net : : UDP

  1. If you do not use ‘multicast address’,
    1:N communication is not working?

  2. for example,
    2-1) Without ‘multicast address’
    2-2) Set like the code below,

udp = new UDP( this, 12000 );
udp.listen( true );

2-3) At this time, can’t I receive data in 1:N?
(The 1 referred to here is the PC that has set ‘new UDP( this, 12000 )’.)

If anyone knows, please reply.