GeeksforGeeks

Last Updated: 29 January 2024

The Deque extends the Queue interface and provides additional methods to support operation at both ends. This interface is part of the java.util package. The Deque interfa...read more

Java

Java-Collections

Deque descendingIterator() Method in Java

Last Updated: 01 December 2024

ThedescendingIterator()method ofthe Deque Interfacereturns an iterator over the elements in this deque in reverse order. The elements will be returned from the last to the...read more

Deque iterator() method in Java

Last Updated: 20 June 2020

The iterator() method of Deque Interface returns an iterator over the elements in this deque in a proper sequence. The elements will be returned in order from first (head)...read more

Deque getFirst() method in Java

Last Updated: 19 September 2023

The getFirst() method of Deque Interface returns the first element or the head of the Deque. It does not deletes the element. It throws an exception when the Deque is empt...read more

Deque element() method in Java

Last Updated: 19 December 2021

The element() method of Deque Interface returns the element at the front the container. It does not deletes the element in the container. This method returns the head of t...read more

Deque getLast() method in Java

Last Updated: 17 January 2022

The getLast() method of Deque Interface returns the last element or the tail of the Deque. It does not deletes the element. It throws an exception when the Deque is empty....read more

Deque offer() method in Java

Last Updated: 21 September 2018

The offer(E e) method of Deque Interface inserts the specified element into this Deque if it is possible to do so immediately without violating capacity restrictions. This...read more

Deque add() method in Java

Last Updated: 20 November 2020

The add(E e) method of Deque Interface inserts the element passed in the parameter to the end of the Deque if there is space. If the Deque is capacity restricted and no sp...read more

Deque contains() method in Java

Last Updated: 21 September 2018

The contains(E e) method of Deque Interface check for the presence of the element e in the Deque container. If the Deque contains one occurrence of the element, then it re...read more

Deque offerLast() method in Java

Last Updated: 21 September 2018

The offerLast(E e) method of Deque Interface inserts the specified element into the end of the Deque if it is possible to do so immediately without violating capacity rest...read more

Deque offerFirst() method in Java

Last Updated: 19 September 2018

The offerFirst(E e) method of Deque Interface inserts the specified element into the front of the Deque if it is possible to do so immediately without violating capacity r...read more

Deque addLast() method in Java

Last Updated: 03 December 2019

The addLast(E e) method of Deque Interface inserts the element passed in the parameter to the end of the Deque if there is space. If the Deque is capacity restricted and n...read more

Java.util.ArrayDeque Class in Java | Set 2

Last Updated: 02 November 2022

Java.util.ArrayDeque Class in Java | Set 1More Methods of util.ArrayDeque Class :16. offer(Element e) : java.util.ArrayDeque.offer(Element e) : inserts element at the end ...read more

Java.util.ArrayDeque Class in Java | Set 1

Last Updated: 22 August 2022

java.util.ArrayDeque class describes an implementation of a resizable array structure which implements the Deque interface.Array deques has not immutable and can grow as n...read more

Deque Interface in Java

Last Updated: 10 January 2025

Deque Interface present in java.util package is a subtype of the queue interface. The Deque is related to the double-ended queue that supports adding or removing elements ...read more