Stack

java.util.Stack<E> is Java's classic last-in-first-out container. The most recent item you push is the first one you pop, which is the same pattern you'd use to model an undo history, a navigation back button, or a parser walking through nested brackets. This lesson covers what a stack is, how Stack's push/pop/peek API works, an inheritance design choice that hurt the class, and why the official Java docs now point you at a different class for new code.