Why java nio2 can`t listen a udp port?

Question

Why "java.nio.channels.AsynchronousSocket" always listen tcp port? If it could, how can I use it? Which classes are they?

a simple search for java udp will result in `DatagramSocket` — Scary Wombat, Apr 07 '15 at 02:48

score 3 · Answer 1 · answered Aug 17 '15 at 05:48

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They added it and then they removed it in ealier developement stage for jdk 7.

See this: http://bugs.java.com/view_bug.do?bug_id=6993126

answered Aug 17 '15 at 05:48

La VloZ

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score 0 · Answer 2 · answered Apr 07 '15 at 03:17

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UDP is done with the DatagramSocket. The nio functionality can be achieved by getting the associated channel.

answered Apr 07 '15 at 03:17

Brett Okken

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I might be wrong, but Channels / Selectors are not NIO.2, they belong to the old NIO pattern. – vbence Jul 13 '16 at 11:27
@vbence, yes - nio.2 is primarily focused on new ways to work with the file system. The question is really about nio, not nio.2. – Brett Okken Jul 15 '16 at 11:42

score 0 · Answer 3 · answered Apr 07 '15 at 05:48

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Because, as the Javadoc says, AsynchronousSocketChannel is 'an asynchronous channel for stream-oriented connecting sockets', i.e. TCP, and they didn't provide an AsynchronousDatagramChannel yet.

answered Apr 07 '15 at 05:48

user207421

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But, Why they didn't provide an AsynchronousDatagramChannel yet? – Smoke Apr 07 '15 at 06:48

Why java nio2 can`t listen a udp port?

3 Answers3