我理解，你的问题出在对“overload”的理解上。那一段内容实际上是对“overload”的一个简单概述。原文如下：
Only c++ programmers might be surprised by name hiding sice it works differently int that language.If a Java base class has a method name that's overloaded several times,redefining that method name in the derived class will not hide any of the base-class versions.Thus overloading works regardless of whether the method was defined at this level or in a base class:
你现在的理解很模糊，什么叫“否则基类的方法仍然存在”？何谓“存在”？在你看完“upcast”后，应该会有一个完整的理解。
Only c++ programmers might be surprised by name hiding sice it works differently int that language.If a Java base class has a method name that's overloaded several times,redefining that method name in the derived class will not hide any of the base-class versions.Thus overloading works regardless of whether the method was defined at this level or in a base class:
你现在的理解很模糊，什么叫“否则基类的方法仍然存在”？何谓“存在”？在你看完“upcast”后，应该会有一个完整的理解。
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