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Java LinkedList public boolean offerFirst(Object o) method with Example

Java LinkedList public boolean offerFirst(Object o) method: Here, we are going to learn about the public boolean offerFirst(Object o) method of LinkedList class with its syntax and example.
Submitted by Preeti Jain, on June 22, 2019

LinkedList public boolean offerFirst(Object o) method

  • This method is available in package java.util.LinkedList.offerFirst(Object o).
  • This method is used to add a specified object at the front of the linked list.

Syntax:

    public boolean offerFirst(Object o){
    }

Parameter(s):

We can pass only one object as a parameter in the method and that object will add at the front element of the linked list.

Return value:

The return type of this method is boolean that means this method returns true after execution.

Java program to demonstrate example of LinkedList offerFirst(Object o) method

import java.util.LinkedList;

public class LinkList {
    public static void main(String[] args) {
        LinkedList list = new LinkedList();
        // use add() method to add elements in the list 
        list.add(10);
        list.add(20);
        list.add(30);
        list.add(40);
        list.add(50);

        //  Current list Output
        System.out.println("The Current list is:" + list);

        // Add new element at the front of the 
        // linked list using offerFirst(Object o)
        list.offerFirst(60);

        //  New list Output 
        System.out.println("The new List is:" + list);
    }
}

Output

D:\Programs>javac LinkList.java

D:\Programs>java LinkList
The Current list is:[10, 20, 30, 40, 50]
The new List is:[60, 10, 20, 30, 40, 50]





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