What is the difference between a stack and a queue in Java?

What is the difference between a stack and a queue in Java?

A stack is a Last In First Out (LIFO) structure, while a queue is a First In First Out (FIFO) structure.

Can you give me an example of how to implement a stack in Java?

Sure! You can use the Stack class in Java like this:

Stack<Integer> stack = new Stack<>();
stack.push(1);
stack.push(2);
int top = stack.pop(); // top will be 2

How about a queue? Can you show me that too?

Absolutely! You can use the Queue interface with LinkedList like this:

Queue<Integer> queue = new LinkedList<>();
queue.add(1);
queue.add(2);
int front = queue.poll(); // front will be 1

What are some use cases for stacks and queues?

Stacks are often used in function calls and backtracking algorithms, while queues are used in scheduling and buffering.