Using Maven Without a Repo & A Little Java 9 JShell

Let's use Maven to download some jars to the local folder (ie, not the user's .m2 repo).

The pom.xml File

<project>
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.mystuff</groupId>
  <artifactId>rx</artifactId>
  <version>1.0.0</version>
  <packaging>jar</packaging>

  <dependencies>

    <dependency>
      <groupId>io.reactivex.rxjava2</groupId>
      <artifactId>rxjava</artifactId>
      <version>2.1.7</version>
    </dependency>

  </dependencies>
</project>

The Command To Process the pom.xml File

$ mvn dependency:copy-dependencies -DoutputDirectory=lib

This results in downloading rxjava-2.1.7.jar and its dependency, reactive-streams-1.0.1.jar into the lib folder.

Let's Use These Jars in JShell

$ jenv local 9.0
$ jshell --class-path lib/reactive-streams-1.0.1.jar:lib/rxjava-2.1.7.jar
|  Welcome to JShell -- Version 9.0.1
|  For an introduction type: /help intro

jshell>  import io.reactivex.*;

jshell> public class HelloWorld {
   ...>   public static void main(String[] args) {
   ...>     Flowable.just("Hello World").subscribe(System.out::println);
   ...>   }
   ...> }
|  created class HelloWorld

jshell> String[] emptyArray = new String[0];
emptyArray ==> String[0] {  }

jshell> HelloWorld.main(emptyArray);
Hello World

jshell> import io.reactivex.functions.Consumer;

jshell> Flowable.just("Hello World").
   ...> subscribe(new Consumer() {
   ...> @Override public void accept(String s) {
   ...> System.out.println(s);
   ...> }
   ...> });
Hello World
$6 ==> CANCELLED

jshell>