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#1 Created at ... [Delete] [Delete and Lock User]

instanceof实际上判断一个变量所指向的实例是否是指定类型，或者这个类型的子类。

(instanceof前面的变量,是后面的类型,或者是后面类型的子类)

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#2 Created at ... [Delete] [Delete and Lock User]

A instanceof B   A是否含有B类型的所有功能

Even

#3 Created at ... [Delete] [Delete and Lock User]

A instanceof B，A是不是B的儿子孙子（后代）...

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