how to sort the Collection objects in Java?
What are the ways to remove duplicates from ArrayList?
What is WeakHashMap
What are the methods to make collection thread-safe?
What is the peek()of the Queue interface?
How to join multiple ArrayLists?
What is map. entry In Map?
What is the Properties file in collection?
WeakHashMap in Collection
WeakHashMap is an implementation of the Java Map. It is used to store weak references to its keys. Sorting using this Map allows a key-value pair is collected as garbage.
Its key is not referenced outside WeakHashMap.
core java