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Java Fundamentals

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Collections Framework OverviewšŸ’¼
Collection Interface
List Interface
ArrayListšŸ’¼
LinkedList
Vector
Stack
Set Interface
HashSetšŸ’¼
LinkedHashSet
TreeSet
Queue Interface
PriorityQueue
Deque Interface
ArrayDeque
Map Interface
HashMapšŸ’¼
LinkedHashMap
TreeMap
Hashtable
Comparable Interface
Comparator InterfacešŸ’¼
Iterator
Collections Class
Concurrent Collections
Languages/Java/Collections Framework/PriorityQueue

PriorityQueue

Heap-based priority queue

PriorityQueue

Orders elements by priority.

Code Examples

Min-heap by default

java
1
2Queue<Integer> pq = new PriorityQueue<>();
3pq.add(3);
4pq.add(1);
5          

Use Cases

  • Schedulers

Common Mistakes to Avoid

  • Assuming FIFO
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Queue Interface
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Deque Interface
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