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Jul 3, 2024 · Deque is the acronym for double-ended queue. The Deque (double-ended queue) interface in Java is a sub interface of the Queue interface and extends it to provide a double-ended queue, which is a queue that allows elements to be added and removed from both ends. The Deque interface is part of the Java Collections Framework and is used to provide ...
- Introduction and Applications
Language Support: C++ STL provides an implementation of...
- Introduction and Applications
Java Deque. A deque is a linear collection that supports insertion and deletion of elements from both the ends. The name 'deque' is an abbreviation for double-ended queue. There are no fixed limits on the deque for the number of elements they may contain. However, this interface supports capacity restricted deques as well as the deques with no ...
MethodsDescriptionThis method is used to insert a specified ...Adds all the elements in the specified ...Inserts the specified element at the ...Inserts the specified element at the end ...This is so because null is used as a special return value by various methods to indicated that the deque is empty. Deque implementations generally do not define element-based versions of the equals and hashCode methods, but instead inherit the identity-based versions from class Object. This interface is a member of the Java Collections Framework.
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- Working of Deque
- Classes That Implement Deque
- How to Use Deque?
- Methods of Deque
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In a regular queue, elements are added from the rear and removed from the front. However, in a deque, we can insert and remove elements from both front and rear.
In order to use the functionalities of the Dequeinterface, we need to use classes that implement it: 1. ArrayDeque 2. LinkedList
In Java, we must import the java.util.Deque package to use Deque. Here, we have created objects animal1 and animal2 of classes ArrayDeque and LinkedList, respectively. These objects can use the functionalities of the Dequeinterface.
Since Deque extends the Queue interface, it inherits all the methods of the Queue interface. Besides methods available in the Queue interface, the Dequeinterface also includes the following methods: 1. addFirst() - Adds the specified element at the beginning of the deque. Throws an exceptionif the deque is full. 2. addLast()- Adds the specified ele...
The Stack class of the Java Collections frameworkprovides the implementation of the stack. However, it is recommended to use Deque as a stack instead of the Stack class. It is because methods of Stackare synchronized. Here are the methods the Dequeinterface provides to implement stack: 1. push()- adds an element at the beginning of deque 2. pop()- ...
Learn how to use the Deque interface of the Java collections framework, which provides the functionality of a double-ended queue. See examples of ArrayDeque and LinkedList classes, and how to implement Deque as a stack.
Mar 18, 2023 · Learn about deque, a data structure that allows insert and delete at both ends, and its applications in Java. See the implementation of deque using circular array and the operations supported by it.
Java Deque Interface. Java Deque interface belongs to java.util package. It is the subtype of the Queue interface. Deque, short for double-ended queue. The Deque supports the addition as well as the removal of elements from both ends of the data structure. Therefore, a deque can be used as a stack or a queue.
Learn how to use the Deque interface, a double-ended-queue that supports insertion and removal at both ends. See the methods, examples, and predefined classes that implement the Deque interface.
