Java Utility Library

Java ArrayDeque - offerFirst() Method

The java.util.ArrayDeque.offerFirst() method is used to insert the specified element at the front of the deque.

Syntax

public boolean offerFirst(E element)

Here, E is the type of element maintained by the container.

Parameters

element Specify element which need to be inserted in the deque.

Return Value

true.

Exception

Example:

In the example below, the java.util.ArrayDeque.offerFirst() method is used to insert the specified element at the front of the deque.

import java.util.*;

public class MyClass {
  public static void main(String[] args) {
    //creating a ArrayDeque
    ArrayDeque<Integer> MyDeque = new ArrayDeque<Integer>();

    //populating ArrayDeque using offerFirst method
    MyDeque.offerFirst(10);
    MyDeque.offerFirst(20);
    MyDeque.offerFirst(30);

    //printing ArrayDeque
    System.out.println("MyDeque contains: " + MyDeque);   
  }
}

The output of the above code will be:

MyDeque contains: [30, 20, 10]

❮ Java.util - ArrayDeque