The isEmpty() method of ConcurrentLinkedQueue is used to check if this queue is empty or not. It returns true if ConcurrentLinkedQueue contains zero number of elements means if the ConcurrentLinkedQueue is empty.
public boolean isEmpty()
Returns: This method returns true if this ConcurrentLinkedQueue contains zero number of elements.
Below programs illustrate isEmpty() method of ConcurrentLinkedQueue:
ConcurrentLinkedQueue: [Aman, Amar, Sanjeet, Rabi] Is Queue empty: false
ConcurrentLinkedQueue:  Is queue empty : true
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