说明：  Java重构的必读书，非常实用，但有的时候我想，Java代码的重构如此复杂，是否说明面向对象的设计思路在很多场合并不适用呢？
(Java refactoring is a must read book, which is very practical. But sometimes I think that the refactoring of Java code is so complex, does it mean that the object-oriented design idea is not applicable in many fields?)