IMHO, it is quite good, but a lot of talk about it in the books and magazines is just a hype. It has its fallacies and pitfalls, just as the languages it was supposed to replace.
Nobody is perfect.
Of course, I am talking about Java . Here are two tests of JAnime. Simple is a simple test of all objects that are supported. This is my old code for Java algorithm animation applet. As you can see above, everything worked fine.