If you need it very urgent, pay someone for doing your (home)work.
Otherwise feel free to learn Swing.

This excercise isn't very hard and can be solved in different ways.

One possibility is to use a datatype that is suitable for storing the
required visual informations (e. g. java.awt.Point might be enough) and
a custom component which extends javax.swing.JComponent that renders the
information on screen. The latter can be done by overriding
paintComponent. To animate the whole thing a javax.swing.Timer might be
appropriate.

I should stop writing now - otherwise my response might get longer than
the solution...

Bye
Michael