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If I created inside method some kind of collection – list, array or map, after exiting from method if this collection contains references also for external objects GC free the memory?
Or it will be memory leak?
Thanks.
No, there will be no leak. Once your code has no references to a given object, the object becomes eligible for garbage collection.
It does not matter whether the object itself (e.g. a collection) contains references to live objects — it’s references in the opposite direction that matter.