The Java.util.PriorityQueue.clear() method is used to remove all the elements from a PriorityQueue. Using the clear() method only clears all the element from the queue and does not delete the queue. In other words, we can say that the clear() method is used to only empty an existing PriorityQueue.
Parameters: The method does not take any parameter
Return Value: The function does not returns any value.
Below programs illustrate the Java.util.PriorityQueue.clear() method:
PriorityQueue: [4, Geeks, To, Welcome, Geeks] The final Queue: 
PriorityQueue: [5, 10, 30, 20, 15] The final Queue: 
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