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a question about inner class

 
Greenhorn
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Hello,
Why the instance variable of inner class must declare as "final"?
I read some books but don't get it.
Thanks.
 
Author and all-around good cowpoke
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It isn't instance variables but local variables that must be declared final. The reason being that special handling is required - if the object created by the inner class lives beyond the lifetime of the method call, that object will need its own copy of the local variable.
We had quite an extended discussion of the mechanism a few months ago.
Bill
 
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