LoadArtifact.java

Aether aether = Aether.builder()
                      .setLocalRepo(temp.newFolder().getPath())
                      .addRemoteRepo("maven-central", "http://repo1.maven.org/maven2").build();

List<Artifact> dependencies = aether.resolveDependencies(new DefaultArtifact("org.elasticsearch:elasticsearch:5.5.2"));

List<URL> urls = new ArrayList<>();
for (Artifact artifact : dependencies) {
    URL url = new URL(new URL("file:"), artifact.getFile().getAbsolutePath());
    urls.add(url);
}

ClassLoader classLoader = URLClassLoader.newInstance(urls.toArray(new URL[0]), classLoader);