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What is the ArrayDeque.clear method in Java?

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An ArrayDequeArray Double Ended Queue is a growable array that allows us to add or remove an element from both the front and back. This class is the implementation class of the Deque interface. ArrayDeque can be used as a stack or queue. Null elements are prohibited.

What is the clear method of ArrayDeque?

The clear method can be used to delete all the elements of the ArrayDeque object.

Syntax

public void clear()

Parameters

This method doesn’t take any arguments.

Return value

This method doesn’t return any value.

Code

The code below demonstrates how to use the clear method.

import java.util.ArrayDeque;
class Clear {
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);
arrayDeque.clear();
System.out.println("After calling the clear method the deque is " + arrayDeque);
}
}

Explanation

In the code above:

  • 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 deque.

  • In line 10: We use the clear() method of the arrayDeque object to delete all the elements of the deque.

RELATED TAGS

java
communitycreator

Grokking Modern System Design Interview for Engineers & Managers

Ace your System Design Interview and take your career to the next level. Learn to handle the design of applications like Netflix, Quora, Facebook, Uber, and many more in a 45-min interview. Learn the RESHADED framework for architecting web-scale applications by determining requirements, constraints, and assumptions before diving into a step-by-step design process.

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