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instance methods - separate copies?  RSS feed

 
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Clearly every instance of a class has its own copy of an instance variable. But when it comes to methods, does every instance actually have a separate copy of the code of a non-static method?

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Iris Rawleigh wrote:Clearly every instance of a class has its own copy of an instance variable. But when it comes to methods, does every instance actually have a separate copy of the code of a non-static method?

Thanks



No. The main difference between an instance method and a static method is that an instance method gets a reference to the object that calls it (the "this" instance). The actual location of the methods are not stored with the instances.

Henry
 
Iris Rawleigh
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Henry Wong wrote:
No. The main difference between an instance method and a static method is that an instance method gets a reference to the object that calls it (the "this" instance). The actual location of the methods are not stored with the instances.

Henry



Ah, ok that makes more sense. Are these references stored on the stack?

Iris
 
Henry Wong
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Iris Rawleigh wrote:
Ah, ok that makes more sense. Are these references stored on the stack?

Iris



EDIT >>>> Sorry, mis-read you question.... Yes, the "this" reference is one of the parameters to the method, so yes, it is pushed onto the stack during the call.

Henry
 
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