Explanation of “ClassCastException” in Java

Question

I read some articles written on \"ClassCastException\", but I couldn\'t get a good idea on that. Is there a good article or what would be a brief explanation?

Answer 1

Exception is not a subclass of RuntimeException -> ClassCastException

    final Object  exception = new Exception();
    final Exception data = (RuntimeException)exception ;
    System.out.println(data);