🚀 go-pugleaf

Hello please excuse me this beginner question,
but I couldn't find an answer yet:

If you want to create an animation applet with JDK you simply create a
Runnable class, put a loop with a repaint() in the run() method and
put the drawing stuff with or without buffering in the paint() method.
I think, that I have understood this.

BUT, what do I have to do to make an animation on a panel created with
JBuilder ?

If I choose "new - applet" I get the sceleton code, but inserting
"implements Runnable" results with a compiler error "needs to be
abstract". As I do not understand this, I leave that autogenerated
class the way it is and add a new one to the project wich implements
Runnable and therefore uses Threads. But what do I have to write
there, if I want the animation to take place on a panel of the
automatic generated class ?
Let us assume, that there's a bevelPanel1 in the automatic generated
class (designed with the desgin tab) and that I want to draw the
actual time updated every second on that bevelPanel1. What do I have
to do in the Runnable class ?!?!?!

public class AnimationClass extends java.applet.Runnable implements
Runnable {
...
} 

Is "extends java.applet.Runnable" already wrong ?!?!

Pleas help,
D.