What is a stack data structure in Java?

What is a stack data structure in Java?

A stack is a linear data structure that follows the Last In First Out (LIFO) principle. In Java, it can be implemented using the Stack class.

Can you show me how to implement a stack in Java?

Sure! Here's a simple implementation:

import java.util.Stack;

public class StackExample {
    public static void main(String[] args) {
        Stack<Integer> stack = new Stack<>();
        stack.push(1);
        stack.push(2);
        stack.push(3);
        System.out.println(stack.pop()); // Outputs 3
    }
}

What are some common operations performed on a stack?

Common operations include push (adding an item), pop (removing the top item), peek (viewing the top item), and checking if the stack is empty.

What are the use cases for stacks in programming?

Stacks are used in various scenarios like function call management, expression evaluation, and backtracking algorithms.