You may have non-private variables in your class, but you may then see unexpected behavior in a production application because of how Tapestry pools and reuses pages and components.

• 在你的类中可以有非私有的变量，但是这样你就会在你的程序中看到不可预料的异常行为，这是因为Tapestry对页面和组件的缓冲和重用。