title: "package java.net.http does not exist" error on JDK9
body: <p>I have a problem compiling simple blocking GET example from the HttpRequest JavaDoc:</p>
  
  <pre><code>package org.example;
  
  import java.io.IOException;
  import java.net.URI;
  import java.net.URISyntaxException;
  import java.net.http.HttpRequest;
  import java.net.http.HttpResponse;
  
  import static java.net.http.HttpRequest.noBody;
  import static java.net.http.HttpResponse.asString;
  
  public class Http2 {
      public static void main(String[] args) throws URISyntaxException, IOException, InterruptedException {
          HttpResponse response = HttpRequest
                  .create(new URI("http://www.infoq.com"))
                  .body(noBody())
                  .GET().response();
          int responseCode = response.statusCode();
          String responseBody = response.body(asString());
  
          System.out.println(responseBody);
      }
  }
  </code></pre>
  
  <p>I'm getting <code>package java.net.http does not exist</code> error when compiling using JDK 9:</p>
  
  <pre>
  { jdk9 }  » /cygdrive/c/Program\ Files/Java/jdk-9/bin/javac -d out/production -modulesourcepath org.example.module1/src/ -m org.example.module1
  
  org.example.module1\src\org.example.module1\org\example\Http2.java:6: error: package java.net.http does not exist
  import java.net.http.HttpRequest;
                      ^
  org.example.module1\src\org.example.module1\org\example\Http2.java:7: error: package java.net.http does not exist
  import java.net.http.HttpResponse;
                      ^
  org.example.module1\src\org.example.module1\org\example\Http2.java:9: error: package java.net.http does not exist
  import static java.net.http.HttpRequest.noBody;
                             ^
  org.example.module1\src\org.example.module1\org\example\Http2.java:9: error: static import only from classes and interfaces
  import static java.net.http.HttpRequest.noBody;
  ^
  org.example.module1\src\org.example.module1\org\example\Http2.java:10: error: package java.net.http does not exist
  import static java.net.http.HttpResponse.asString;
                             ^
  org.example.module1\src\org.example.module1\org\example\Http2.java:10: error: static import only from classes and interfaces
  import static java.net.http.HttpResponse.asString;
  ^
  org.example.module1\src\org.example.module1\org\example\Http2.java:14: error: cannot find symbol
          HttpResponse response = HttpRequest
          ^
    symbol:   class HttpResponse
    location: class Http2
  org.example.module1\src\org.example.module1\org\example\Http2.java:14: error: cannot find symbol
          HttpResponse response = HttpRequest
                                  ^
    symbol:   variable HttpRequest
    location: class Http2
  org.example.module1\src\org.example.module1\org\example\Http2.java:16: error: cannot find symbol
                  .body(noBody())
                        ^
    symbol:   method noBody()
    location: class Http2
  org.example.module1\src\org.example.module1\org\example\Http2.java:19: error: cannot find symbol
          String responseBody = response.body(asString());
                                              ^
    symbol:   method asString()
    location: class Http2
  10 errors
  </pre>
  
  <p>Same error occurs using command line and IntelliJ.</p>
  
  <p>It is not a problem with my module because classes without java.net.http compiles and run without any problem.</p>
  
  <p>Any idea what is going on?</p>