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 result of running c's main method might surprise you — it'll issue a ClassCastException!
运行c的main方法的结果可能会让您吃惊—它将发出一个ClassCastException ！
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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