weakhashmap - w3toppers.com

What is a WeakHashMap and when to use it? [duplicate]

Elements in a weak hashmap can be reclaimed by the garbage collector if there are no other strong references to the key object, this makes them useful for caches/lookup storage. Weak reference are not restricted to these hash tables, you can use WeakReference for single objects. They are useful to save resource, you can keep … Read more

Is WeakHashMap ever-growing, or does it clear out the garbage keys?

Yes, keys cleared after garbage is actually collected Yes, WeakHashMap does clean out the detritus. The keys that have gone to garbage collection are no longer reported in the size. But you must wait for garbage-collection to actually take place. Seems likely that you were incorrect about your objects going to garbage-collection. Perhaps your objects … Read more