Insert in scene object X3D & 3DS

Hi all guys.

I need a your help. While I am inexperienced. I'm studying just the JME.

I need to ask you a question?

You can insert objects into a scene with X3D and 3ds extension?

I saw a table with all the formats that supports JME, and there are these two.

My question is: How can I enter? Someone can post a sample code??