For a more dynamic approach (for example if destination is moving) you could do a velocity, acc, max speed, type approach.
Modify the velocity towards 0 or towards max speed based on distance from target. Velocity could be a simple speed in which case you always move directly towards or a vect3f which would allow nicer curving towards…however be aware in the latter case that it will tend to “orbit” and you will need some damping logic as well.
to add another thing into the mix, you can also use the MotionPath of the Cinematics system which i believe supports easing
I don't think to just move objects one should use the cinematics system.. Its really not hard moving stuff on the screen directly, its one of the most basic things to do in a game. If you depend on external animation classes to do that, thats just going to make your code more complicated. Been there, done that in my very first jME2 games... just move them manually ;)