The exception can be a string, integer, Boolean or an object.
例外可以是串，整数，布尔或是对象。
Returns a Boolean value that indicates whether or not an object is an instance of a particular class.
传回的布林值将说明物件是否为某个特定类别的执行个体。
Returns a Boolean value that indicates whether or not an object is an instance of a particular class.
传回的布林值将说明物件是否为某个特定类别的执行个体。
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