Java 9 no class definition exception

Question

So i want to try the http client

package com.company;

import jdk.incubator.http.HttpClient;

public class Main {

public static void main(String[] args) {
          


        

Answer 1

I ran into the same problems

java.lang.NoClassDefFoundError: jdk/incubator/http/HttpClient

with java-9-ea+173 and IntelliJ. I followed Eugenes and Nicolais advice to add jdk.incubator.httpclient explicitly to the module path via --add-modules jdk.incubator.httpclient in Run/Debug Configurations (on macOS: Menu Bar -> Run -> Edit Configurations -> Configuration Tab -> VM Options -> --add-modules jdk.incubator.httpclient

After that everything worked fine. Of course you have to add the dependency into the module-info.java like this as said before:

module network {
    requires jdk.incubator.httpclient;
}

UPDATE:

With the latest IntelliJ IDEA 2017.2 EAP 172.2953.9 , I don't need to put the --add-modules to the VM Options. It just works out of the box.