An
This class is the implementation class of the Deque interface. ArrayDeque can be used as a stack or queue. Null elements are prohibited.
pop method of ArrayDeque?The pop method can be used to get and remove the first element of the ArrayDeque object.
public E pop()
This method doesn’t take any parameters.
The pop() method retrieves and removes the first element of the deque object. If the deque object is empty, then NoSuchElementException is thrown.
This method is the same as the
removeFirstmethod.
The code below demonstrates how to use the pop method.
import java.util.ArrayDeque;class Pop {public static void main( String args[] ) {ArrayDeque<String> arrayDeque = new ArrayDeque<>();arrayDeque.add("1");arrayDeque.add("2");arrayDeque.add("3");System.out.println("The arrayDeque is " + arrayDeque);System.out.println("arrayDeque.pop() returns : " + arrayDeque.pop());System.out.println("The arrayDeque is " + arrayDeque);}}
In the above code:
In line 1: We import the ArrayDeque class.
In line 4: We create an ArrayDeque
object with the name arrayDeque.
From lines 5 to 7: We use the add() method of the arrayDeque object to add three elements ("1","2","3") to dequeu.
In line 10: We use the pop() method of the arrayDeque object to get and remove the first element. In our case, 1 will be removed and returned.