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?
The methods to make collection thread-safe are
The methods to make collection thread safe are:
Collections.synchronizedList(list);
Collections.synchronizedMap(map);
Collections.synchronizedSet(set);
core java