I came across this article from java.net about how to invoke a JVM from Assembly! I was luck enough to not have to work with Assembly in college but anyone I have ever talked to about it said it was pretty painful to work with. You are probably wondering the same I was: Why use Java with Assembly this is what the author, Biswajit Sarkar, has to say

JNI is essential to the implementation of Java, since the JVM needs to interact with the native platform to implement some of its functionality. Apart from that, however, use of Java classes can often be an attractive supplement to applications written in other languages, as Java offers a wide selection of APIs that makes implementation of advanced functions very simple.

Here is the full article.