Java ArrayDeque Class: add() Method

public boolean add(E e)

The add() method is used to insert an given element at the end of this deque.

Note: This method is equivalent to addLast(E).

Package: java.util

Java Platform: Java SE 8

Syntax:

add(E e)

Return Value:

true (as specified by Collection.add(E))

Return Value Type: boolean

NullPointerException - if the specified element is nullThrows:

Pictorial Presentation

Example: Java ArrayDeque Class: add() 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 5
      Deque<Integer> deque = new ArrayDeque<Integer>(5);

      // Use add() method to add 7 elements in the deque
      deque.add(10);
      deque.add(20);
      deque.add(30);
      deque.add(40);        
      deque.add(50);        
      deque.add(60);        
      deque.add(70);        

      // Print all the elements of deque
      for (Integer n : deque) {
         System.out.println(n);
      }
   }
}

Output:

10
20
30
40
50
60
70

Java Code Editor:

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