Java instance creation with object as parameter












0














When i create an object of a class which accepts object as a parameter
for Example



GarbageCollected gc= new GarbageCollected();
WeakReference<GarbageCollected> reference = new WeakReference<GarbageCollected>()(gc);


So here how does the reference 'gc' works internally while one creates the object of 'WeakReference' class with "gc' as the argument.










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  • 1




    When you pass a reference to an object as an argument to a constructor, it works the same as passing any value to a method’s or constructor’s parameter. The code inside the method or constructor may store that reference to a field of the object or not. That’s the basics you should have understood before ever dealing with things like WeakReference.
    – Holger
    Nov 23 '18 at 17:31










  • @Holger what i wanted to understand is how the referencing happens and if one is unreferenced that it is subjected to null then what about the objects holding a reference to the nullified object.
    – Rajiv
    Nov 29 '18 at 15:53










  • What do you mean with “how the referencing happens”? Further, do you understand that WeakReference is special and hence, not an example of “create an object of a class which accepts object as a parameter”? There is no such thing like a “nullified object”.
    – Holger
    Nov 29 '18 at 16:23
















0














When i create an object of a class which accepts object as a parameter
for Example



GarbageCollected gc= new GarbageCollected();
WeakReference<GarbageCollected> reference = new WeakReference<GarbageCollected>()(gc);


So here how does the reference 'gc' works internally while one creates the object of 'WeakReference' class with "gc' as the argument.










share|improve this question


















  • 1




    When you pass a reference to an object as an argument to a constructor, it works the same as passing any value to a method’s or constructor’s parameter. The code inside the method or constructor may store that reference to a field of the object or not. That’s the basics you should have understood before ever dealing with things like WeakReference.
    – Holger
    Nov 23 '18 at 17:31










  • @Holger what i wanted to understand is how the referencing happens and if one is unreferenced that it is subjected to null then what about the objects holding a reference to the nullified object.
    – Rajiv
    Nov 29 '18 at 15:53










  • What do you mean with “how the referencing happens”? Further, do you understand that WeakReference is special and hence, not an example of “create an object of a class which accepts object as a parameter”? There is no such thing like a “nullified object”.
    – Holger
    Nov 29 '18 at 16:23














0












0








0







When i create an object of a class which accepts object as a parameter
for Example



GarbageCollected gc= new GarbageCollected();
WeakReference<GarbageCollected> reference = new WeakReference<GarbageCollected>()(gc);


So here how does the reference 'gc' works internally while one creates the object of 'WeakReference' class with "gc' as the argument.










share|improve this question













When i create an object of a class which accepts object as a parameter
for Example



GarbageCollected gc= new GarbageCollected();
WeakReference<GarbageCollected> reference = new WeakReference<GarbageCollected>()(gc);


So here how does the reference 'gc' works internally while one creates the object of 'WeakReference' class with "gc' as the argument.







garbage-collection parameter-passing weak-references






share|improve this question













share|improve this question











share|improve this question




share|improve this question










asked Nov 23 '18 at 11:04









RajivRajiv

5113




5113








  • 1




    When you pass a reference to an object as an argument to a constructor, it works the same as passing any value to a method’s or constructor’s parameter. The code inside the method or constructor may store that reference to a field of the object or not. That’s the basics you should have understood before ever dealing with things like WeakReference.
    – Holger
    Nov 23 '18 at 17:31










  • @Holger what i wanted to understand is how the referencing happens and if one is unreferenced that it is subjected to null then what about the objects holding a reference to the nullified object.
    – Rajiv
    Nov 29 '18 at 15:53










  • What do you mean with “how the referencing happens”? Further, do you understand that WeakReference is special and hence, not an example of “create an object of a class which accepts object as a parameter”? There is no such thing like a “nullified object”.
    – Holger
    Nov 29 '18 at 16:23














  • 1




    When you pass a reference to an object as an argument to a constructor, it works the same as passing any value to a method’s or constructor’s parameter. The code inside the method or constructor may store that reference to a field of the object or not. That’s the basics you should have understood before ever dealing with things like WeakReference.
    – Holger
    Nov 23 '18 at 17:31










  • @Holger what i wanted to understand is how the referencing happens and if one is unreferenced that it is subjected to null then what about the objects holding a reference to the nullified object.
    – Rajiv
    Nov 29 '18 at 15:53










  • What do you mean with “how the referencing happens”? Further, do you understand that WeakReference is special and hence, not an example of “create an object of a class which accepts object as a parameter”? There is no such thing like a “nullified object”.
    – Holger
    Nov 29 '18 at 16:23








1




1




When you pass a reference to an object as an argument to a constructor, it works the same as passing any value to a method’s or constructor’s parameter. The code inside the method or constructor may store that reference to a field of the object or not. That’s the basics you should have understood before ever dealing with things like WeakReference.
– Holger
Nov 23 '18 at 17:31




When you pass a reference to an object as an argument to a constructor, it works the same as passing any value to a method’s or constructor’s parameter. The code inside the method or constructor may store that reference to a field of the object or not. That’s the basics you should have understood before ever dealing with things like WeakReference.
– Holger
Nov 23 '18 at 17:31












@Holger what i wanted to understand is how the referencing happens and if one is unreferenced that it is subjected to null then what about the objects holding a reference to the nullified object.
– Rajiv
Nov 29 '18 at 15:53




@Holger what i wanted to understand is how the referencing happens and if one is unreferenced that it is subjected to null then what about the objects holding a reference to the nullified object.
– Rajiv
Nov 29 '18 at 15:53












What do you mean with “how the referencing happens”? Further, do you understand that WeakReference is special and hence, not an example of “create an object of a class which accepts object as a parameter”? There is no such thing like a “nullified object”.
– Holger
Nov 29 '18 at 16:23




What do you mean with “how the referencing happens”? Further, do you understand that WeakReference is special and hence, not an example of “create an object of a class which accepts object as a parameter”? There is no such thing like a “nullified object”.
– Holger
Nov 29 '18 at 16:23












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