创建和销毁对象

This chapter concerns creating and destroying objects: when and how to create them, when and how to avoid creating them, how to ensure they are destroyed in a timely manner, and how to manage any cleanup actions that must precede their destruction.

本章关注创建和销毁对象：何时及如何创建它们，何时及如何避免创建它们，如何保证它们在适当的时候被销毁，以及如何管理那些必须在销毁前进行的销毁动作。