The LinkedList data collection is represented by a stack in the system. To stack and unstack, LinkedList has two methods: push and pop. This example shows how to call the push() and pop() methods on LinkedList.

public void push(Object o): Inserts an element into the stack header of LinkedList.

Example:

import java.util.LinkedList; 

public class PushPop {

 public static void main(String[] args) {
 
 LinkedList llist = new LinkedList(); 

 llist.add("e1"); 
 llist.add("e2"); 
 llist.add("e3"); 

 System.out.println(llist); 
 
 llist.push("New Element"); 

 System.out.println(llist); 
 }
}

Output:

[e1, e2, e3]
[New element, e1, e2, e3]

public void pop(): Removes the first element of the stack header from LinkedList.

import java.util.LinkedList; 

public class PushPop {

 public static void main(String[] args) {
 
 LinkedList llist = new LinkedList(); 

 llist.add("e1"); 
 llist.add("e2"); 
 llist.add("e3"); 

 System.out.println(llist); 
 
 llist.pop(); 

 System.out.println(llist); 
 }
}

Output:

[e1, e2, e3]
[e2, e3]

The deleted item is: e1.

As a conclusion, we can say that the use of push() and pop() is favorable when you want to add an element to the first position or remove the first element from LindekList.