为什么不建议使用protected创建域？ 丨 永不冷�龅娜松�



为什么不建议使用protected创建域？ 丨 永不冷�龅娜松�

尽管可以创建protected域，但是最好的方式还是将域保持为private；你应当一直保留"更改底层实现"的权利。然后通过protected方法来控制类的继承者的访问权限。

因为封装性，我们要把接口和实现分离，并且确保这个对象不能被客户端直接访问。至于子类要访问它，就通过protected的get吧！


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