实例1 产生自己的控件
....................\1.gif
....................\2.gif
....................\3.gif
....................\4.gif
....................\5.gif
....................\7-1.bmp
....................\IconComboBoxDemo$1.class
....................\IconComboBoxDemo.class
....................\IconComboBoxDemo.java
....................\IconRenderer.class
....................\IconRenderer.java
....................\Thumbs.db