The java.util.concurrent.ConcurrentLinkedDeque.removeFirstOccurrence() method is an in-built method in Java which accepts a parameter and removes the first appearance of that element in the deque. Thus, in case the element is not present in the deque, it remains unchanged.
public boolean removeFirstOccurrence(Object o)
Parameters: The function accepts an object elem as parameter which denotes the object whose first appearance from the deque is to be removed.
Return Value: The function returns true if elem is present in th edeque and returns false otherwise.
Exception: The function throws NullPointerException if the specified element passed as parameter to the function is null.
Below programs illustrate the use of removeFirstOccurrence() method :
Elements in the LinkedDeque: [Geeks, gfg, Gfg, Geeks, GFG] Elements in the LinkedDeque: [gfg, Gfg, Geeks, GFG]
Elements in the LinkedDeque: [379, 1050, 1008, 280, 12] java.lang.NullPointerException
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