Java ArrayDeque Class: isEmpty() Method

public boolean isEmpty()

Returns true if this deque contains no elements.

Package: java.util

Java Platform: Java SE 8

Syntax:

isEmpty()

Return Value:

true if this deque contains no elements

Return Value Type:boolean

Pictorial Presentation:

Example: Java ArrayDeque Class: isEmpty() Method

import java.util.ArrayDeque;
import java.util.Deque;

public class Main {
   public static void main(String[] args) {
   
   // Create an empty array deque with an initial capacity.
      Deque<Integer> deque = new ArrayDeque(8);

    // Test whether the Deque is empty or not.
        if (deque.isEmpty())
        {
            System.out.println("The ArrayDeque is empty.");
        }
        else
        {
            System.out.println("The ArrayDeque is not empty.");
        }
    }
}

Output:

The ArrayDeque is empty.

Java Code Editor:

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