Hello everyone!
I am currently studying game development at Mediacollege Amsterdam.
Before summer break while math classes did we made some elastic collision with two balls in AS3.
While my summer break i began starting to work more with java and tried to remake the elastic collision in java
but now with an array of balls with mass instead of 2 balls.
And i made it! 
Here is the result:
http://justinbieshaar.com/images/elastic.gif
How to:
Click and hold to create a bigger ball.
I did not use libary’s