The Java.util.ArrayDeque.push(E element) method is used to push an element into the Deque. The operation is similar to the operation in the stack. The element gets pushed onto the top of the deque.
Parameters: The parameter element is of the type ArrayDeque and refers to the element to be pushed into the deque.
Return Value: The method does not return any value.
Exceptions: The method throws NullPointerException if the passed parameter is NULL.
Below programs illustrate the Java.util.ArrayDeque.push() method:
Program 1: Adding String elements into the Deque.
Initial Deque: [Welcome, To, Geeks, 4, Geeks] Final Deque: [World, Hello, Welcome, To, Geeks, 4, Geeks]
Program 2: Adding Integer elements into the Deque.
Initial Deque: [10, 15, 30, 20, 5] Final Deque: [4521, 1254, 10, 15, 30, 20, 5]
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