To create a custom exception, you can create your own exception class.
要创建一个自定义的异常，你可以自定义一个异常类。
Problem is, the only exception I catch is the base class.
现在的问题是，我只能捕获基类这个异常。
So the above code does not trigger a class cast exception.
因此上述代码不会触发类转换异常。
ClassNotFoundException is the most common type of class loading exception.
ClassNotFoundException是最常见的类装入异常类型。
Another exception that can be thrown by the class loader is ClassCastException.
类装入器能够抛出的另一个异常是ClassCastException。
The queueing system imposes an important exception to this rule with a priority class.
这个排队系统在 prioirty类（class）上增加了重要的规则。
The serialization runtime or the class of the instance can throw this exception.
序列化过程或该实例的类可以抛出该异常。
The exception that is thrown when there is an attempt to access an unloaded class.
尝试访问已卸载的类时所引发的异常。
Initializes a new instance of the class with a message that describes the exception.
使用描述例外状况的讯息，初始化此类别的新执行个体。
Initializes a new instance of the class with a message that describes the exception.
使用描述例外状况的讯息，初始化此类别的新执行个体。
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