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protect multi level derivation

 
Suddhasattwa Mukherjee
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how to protect multilevel inheritance using final key word.
[ January 02, 2009: Message edited by: Suddhasattwa Mukherjee ]
 
Campbell Ritchie
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You can label a class final in which case it cannot be a superclass to anything. You can label an instance method final in which case it cannot be overridden.

"Multilevel derivation" is not a Java phrase which I am familiar with; what does it mean?
 
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