Why does my uberjar not work on Windows 7?

Question

I created a new project using Clojure by doing this on a Mac:

lein new app clojure-noob

Created my uberjar using

lein uberjar

Sure enough, I can run this uberjar via:

java -jar target/uberjar/clojure-noob-0.1.0-SNAPSHOT-standalone.jar 

And I get:

Hello, World!

Now I take this file to Windows 7 and give the same command:

java -jar clojure-noob-0.1.0-SNAPSHOT-standalone.jar

I seem to get an infinite wait. Why can't I get to runt his .jar file on Windows?

The java version on Mac is:

java version "1.8.0_51"
Java(TM) SE Runtime Environment (build 1.8.0_51-b16)
Java HotSpot(TM) 64-Bit Server VM (build 25.51-b03, mixed mode)

The java version on Windows 7 is:

java version "1.8.0_66"
Java(TM) SE Runtime Environment (build 1.8.0_66-b18)
Java HotSpot(TM) Client VM (build 25.66-b18, mixed mode)

lein version gives the following: Leiningen 2.5.3 on Java 1.8.0_51 Java HotSpot(TM) 64-Bit Server VM

Answer 1

The answer is that I was trying to run the .jar from shared folders on a Windows 7 VM from VirtualBox running on a Mac. This IO is very slow.

When I just copy that file to, say, Desktop and run from there - the access is quiet fast. Thanks SubOptimal for helping me figure this out.