gistfile1.txt

import org.graalvm.polyglot.*;
import java.util.List;

class M {
    public static void main(String[] args) {
        try (Context context = Context.newBuilder().allowAllAccess(true).build()) {
            java.util.ArrayList v = context.eval("js",
            "var ArrayList = Java.type('java.util.ArrayList');" +
            "var list = new ArrayList();" + 
            "list.add(1); list").asHostObject();
            System.out.println(v.get(0));
            assert v.get(0).equals(1);
        }
    }
}
// graalvm-ce-java8-20.0.0/bin/javac M.java && graalvm-ce-java8-20.0.0/bin/java -ea M