Java Stack - pop() Method

The java.util.Stack.pop() method deletes the top element of the stack and returns the deleted element as the value of this method. In a stack, addition and deletion of a element occurs from the top of the stack. Hence, the most recently added element will be the top element of the stack. Every deletion of element results into reducing the stack size by one unless the stack is empty.

Syntax

public E pop()

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

Parameters

No parameter is required.

Return Value

returns the deleted element of the stack.

Exception

Throws EmptyStackException, if this stack is empty.

Example:

In the example below, the java.util.Stack.pop() method is used to delete the top element of the stack called MyStack.

import java.util.*;

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

    //populating stack
    MyStack.push(10);
    MyStack.push(20);
    MyStack.push(30);

    //deleting top element
    System.out.println(MyStack.pop() + " is deleted from MyStack.");

    //printing stack
    System.out.println("MyStack contains: " + MyStack);
  }
}

The output of the above code will be:

30 is deleted from MyStack.
MyStack contains: [10, 20]