Sample Http2 Client - Java 9

Http2client.java

import jdk.incubator.http.HttpClient;
import jdk.incubator.http.HttpRequest;
import jdk.incubator.http.HttpResponse;

import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;

public class Http2client {

    public static void main(String[] args) {

        HttpRequest httpRequest = null;
        HttpResponse<String> httpResponse = null;
        HttpClient httpClient = HttpClient.newHttpClient(); //HTTP_2
        System.out.println("httpClient.version() : "+ httpClient.version());

        try {
            //Get Request
            httpRequest = HttpRequest
                      .newBuilder()
                      .uri(new URI("https://www.google.com/")).GET().build();

            //POST Request
            httpRequest = HttpRequest
                    .newBuilder()
                    .uri(new URI("https://sampleURL.com"))
                    .POST(HttpRequest.BodyProcessor.fromString("{\n" +
                            "  \"Key1\": \"value1\",\n" +
                            "  \"Key2\": \"value2\",\n"
                            "}"))
                    .header("Content-Type","application/json")
                    .build();

            httpResponse = httpClient.send(httpRequest, HttpResponse.BodyHandler.asString());
            System.out.println(httpResponse.body());
        } catch (IOException | InterruptedException | URISyntaxException e) {
            e.printStackTrace();
        }
    }
}