Then you can test if the mouse is pressed in an Ellipse to determine what its behavior should be, and you could use the List of Ellipse2D objects to obtain the line end points when drawing in the paintComponent(...) method.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.