weakhashmap – Tarik Billa

Is there java.util.concurrent equivalent for WeakHashMap?

April 13, 2023 by Tarik

Guava’s CacheBuilder class allows you to do this easily. CacheBuilder.newBuilder().weakKeys().build() Note that this changes key equality semantics to be == instead of .equals() which will not matter in your case of using Class instances but is a potential pitfall.

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

November 18, 2022 by Tarik

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