/*A data structure is a particular way of organizing

data in a computer so that it can be used effectively.

​

For example, we can store a list of items having the same

data-type using the array data structure.*/

Here are some of the data structures in java:   

    Array

    Linked List

    Stack 

    Queue

    Binary Tree

    Binary Search Tree

    Heap

    Hashing 

    Graph

import java.util.*;

​

public class StackExample {

    public static void main(String[] args) {

        Stack<Integer> stack = new Stack<>();

​

        // Pushing elements onto the stack

        stack.push(10);

        stack.push(20);

        stack.push(30);

​

        // Popping elements from the stack

        int poppedElement = stack.pop();

        System.out.println("Popped element: " + poppedElement);

​

        // Peeking at the top element of the stack

        int topElement = stack.peek();

        System.out.println("Top element: " + topElement);

​

        // Checking if the stack is empty

        boolean isEmpty = stack.isEmpty();

        System.out.println("Is stack empty? " + isEmpty);

​

        // Getting the size of the stack

        int stackSize = stack.size();

        System.out.println("Stack size: " + stackSize);

    }

}

The data structure is not any programming language like C, C++, java, etc. 

It is a set of algorithms that we can use in any programming language to

structure the data in the memory. To structure the data in memory, 'n' number of 

algorithms were proposed, and all these algorithms are known as Abstract data types.

​

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