What is the HTTP/2 client in Java 9?

Http/2 Client APIIntroduced in Java 9. It has more performance improvements than Http/1.1 and also supports server-side push events. This makes the site efficient and faster to browse. Http/2 Client is an incubator module named jdk.incubator.httpclient, which means that all features are not finalized yet and new changes may be in the future of java appears in the version. It exports the jdk.incubator.http package that contains all public APIs.

To use the Http/2 client, we need to use the incubator module, we just need to use the "-add-modules" command to httpclient Module is passed into JShell as shown below

<strong>C:\>jshell -v --add-modules jdk.incubator.httpclient
| Welcome to JShell -- Version 9.0.4
| For an introduction type: /help intro</strong>

Example

<strong>jshell> import jdk.incubator.http.*;

jshell> HttpClient httpClient = HttpClient.newHttpClient();
httpClient ==> jdk.incubator.http.HttpClientImpl@534df152
| created variable httpClient : HttpClient

jshell> HttpRequest httpRequest = HttpRequest.newBuilder().uri(new URI("https: //www.google.com")).GET().build();
httpRequest ==> https://www.google.com GET
| created variable httpRequest : HttpRequest

jshell> HttpResponse httpResponse = httpClient.send(httpRequest, HttpResponse.BodyHandler.asString());
httpResponse ==> jdk.incubator.http.HttpResponseImpl@609cd4d8
| created variable httpResponse : HttpResponse

jshell> System.out.println(httpResponse.statusCode());
403</strong>
<strong>
jshell> System.out.println(httpResponse.body());
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