Welcome to an exciting exploration of two fundamental data structures: Stacks and Queues! Remember, data structures store and organize data in a manner that is structured and efficient. Stacks and Queues are akin to stacking plates and standing in a line, respectively. Intriguing, isn't it? Let's dive in!

ArrayDeque (Double-Ended Queue) is a versatile data structure that combines the features of both Stack and Queue. It provides efficient methods for adding and removing elements from both ends of the collection:

• Stack Operations:
  • addLast(): Adds an element to the end (top of stack)
  • removeLast(): Removes and returns the last element (top of stack)
• Queue Operations:
  • addLast(): Adds an element to the end of queue
  • removeFirst(): Removes and returns the first element

Additional useful methods include:

• isEmpty(): Checks if the collection is empty
• size: Returns the number of elements
• : Views the first element without removing it