Description: Abnormalities in the child in the parent class overrides reflected 1 subclasses override the parent, if the parent class method throws an exception, then the subclass override method, only the parent class throws an exception or a subclass of the exception . 2, if the parent class method throws multiple exceptions, then subclasses override this method, you can only throw an exception subset of the parent class. 3, if the parent class or interface method does not throw an exception, then the subclass overriding a method, it can not throw an exception. If the sub-class method of the exception. We must try to be processed. Absolutely can not throw.
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ExceptionDemo7.java
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