notes.txt

书籍"Java_面向事件编程"的附带光盘代码

This program allows the user to place balls on the canvas using the mouse.  On exiting the window, a simulation of a "chain reaction" begins:
the most recently drawn ball hits into the second most recently drawn,
which hits into the next ball, and so on.  This program demonstrates the use
of a recursive list which keeps track of the balls.