Java Collections Explained 1. HashMap - https://t.co/NkvgDzMqYw 2. ArrayList - https://t.co/5X6uQ0Drzv 3. ConcurrentHashMap - https://t.co/JDiIVXaDCV 4. TreeMap - https://t.co/if0DrSqFSa 5. HashSet - https://t.co/fkFfVLWYJZ 6. BlockingQueue -
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