The java.util.LinkedList.pop() method is used to remove and return the top element from the stack represented by the LinkedList. The method simply pops out an element present at the top of the stack. This method is similar to removeFirst method in LinkedList. Syntax:
LinkedListObject.pop()
Parameters: The method does not take any parameter. Return Value: The method returns the first(top in terms of a stack) value of the stack represented by the LinkedList. Exception: If there is no element in the stack represented by the LinkedList, the pop method will throw NoSuchElementException(). Below program illustrates the of java.util.LinkedList.pop() method: Program 1:Â
java
// Java code to demonstrate pop method in LinkedListÂ
import java.util.LinkedList;Â
public class GfG {    // Main method    public static void main(String[] args)    {Â
        // Creating a LinkedList object to represent a stack.        LinkedList<String> stack = new LinkedList<>();Â
        // Pushing an element in the stack        stack.push("Geeks");Â
        // Pushing an element in the stack        stack.push("for");Â
        // Pop an element from stack        String s = stack.pop();Â
        // Printing the popped element.        System.out.println(s);Â
        // Pushing an element in the stack        stack.push("Geeks");Â
        // Printing the complete stack.        System.out.println(stack);    }} |
Output:
for [Geeks, Geeks]
Program 2 :Â
Java
// Java code to demonstrate pop method in LinkedListÂ
import java.util.LinkedList;Â
public class GfG {    // Main method    public static void main(String[] args)    {Â
        // Creating a LinkedList object to represent a stack.        LinkedList<Integer> stack = new LinkedList<>();Â
        // Pushing an element in the stack        stack.push(10);Â
        // Pushing an element in the stack        stack.push(20);Â
        // Pop an element from stack        Integer ele = stack.pop();Â
        // Printing the popped element.        System.out.println(ele);Â
        // Pop an element from stack        ele = stack.pop();Â
        // Printing the popped element.        System.out.println(ele);Â
        // Throws NoSuchElementException        ele = stack.pop();Â
        // Throws a runtime exception        System.out.println(ele);Â
        // Printing the complete stack.        System.out.println(stack);    }} |
Output:
20
10
then it will throw :
Exception in thread "main" java.util.NoSuchElementException
at java.util.LinkedList.removeFirst(LinkedList.java:270)
at java.util.LinkedList.pop(LinkedList.java:801)
at GfG.main(GfG.java:35)
