notes.txt~

书籍"Java_面向事件编程"的附带光盘代码

This program allows the user to create several different types of objects on
the canvas.  The last object created can be moved by dragging it.  The user can
also change the color of the last shape created by using the color palette
along the side of the window.  The size of the next shape created can be set 
using the slider.  This program demonstrates the use of the JSlider and 
JComboBox GUI components, along with a listener for the JComboBox.