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Java Collections - ArrayDeque.addFirst() Examples

[Last Updated: Nov 8, 2025]

Java Collections Java Java API

Class:

java.util.ArrayDeque

Method:

public void addFirst(E e)

Inserts the specified element at the front of this deque.

Examples

package com.logicbig.example.arraydeque;

import java.util.ArrayDeque;

public class AddFirstExample {

    public static void main(String... args) {
        ArrayDeque<Integer> ad = new ArrayDeque<>();
        ad.add(1);
        ad.add(2);
        ad.addFirst(10);
        System.out.println(ad);
    }
}

Output

[10, 1, 2]

See Also