Working with Stacks in Java

There is a native Stack data structure in java.utils that comes in very handy. It’s implemented as a last-in-first-out (LIFO) stack, as you’d expect, and has push() and pop() methods to add and remove objects, respectively.

I encountered a recent technical interview question that I decided to use it for. The question was about checking whether a String of brackets was balanced. Here’s the solution I came up with: