说明： ava 的新入门者对classpath往往比较困惑，为何在开发环境中能运行的东东出去就不好，或在外面运行的东东挺溜的进了开发环境就死菜，烦死了！
看完俺这篇文章包您万事无忧（夸张点吧） ：） (new beginners tend to classpath puzzled why the development environment can run out on the vertical well, or outside of the Eastern Ting running away into the development environment on the death of vegetables, the draw! I read your article pack everything Inc. (exaggeration spot) :) Oh)
