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。

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If either of the above rules are violated, then a ClassCastException is thrown by the class loader.

如果违反了以上任何一条规则，那么类装入器就会抛出ClassCastException。

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How are we supposed to diagnose a bug like this one when the only error signaled is a ClassCastException in code that makes no use of casts?

当未使用数据类型转换的代码中显示的唯一错误就是ClassCastException时，我们应如何诊断这样的错误？

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