First you will need client api that knows how to handle HTTP2.

java's URL/URI currently don't support http2 at all.
There is JEP http://openjdk.java.net/jeps/110 to add support for it in JDK 9.

AFAK at the moment only https://github.com/square/okhttp client properly supports http2.
But there is lots of development going on around this topic, best to look the internet
for solution that suits you best.

--
tomaz



On Mon, Nov 9, 2015 at 9:12 PM, jorge lima <jorge.ayala2012@gmail.com> wrote:
Hi,

thanks for the answer. But what I really need to know is to discover if some website uses HTTP/2 or not, like how we use in URLConnection with Java:

URL url = new URL("https://developer.jboss.org/");
Map<String, List<String>> map = new HashMap<>();
URL obj = new URL(url.toString());
URLConnection conn = obj.openConnection();
map = conn.getHeaderFields();
...


Thanks again!

2015-11-09 16:51 GMT-03:00 Toma┼ż Cerar <tomaz.cerar@gmail.com>:
It is not just http/2 header :)

but yes, undertow supports it, to enable it you will need to upgrade to Java 8 and do some additional setup.

see https://developer.jboss.org/message/929048
http://undertow.io/blog/2015/03/26/HTTP2-In-Wildfly.html

for how to setup it.

--
tomaz


On Mon, Nov 9, 2015 at 6:15 PM, jorge lima <jorge.ayala2012@gmail.com> wrote:
Hi,

Is there already a way to get the HTTP/2 response header in Java using Undertow? I really need to know. I'm using JDK 7 on my Java Project. Thank you very much!


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