Stack() constructor is used to initialize a new instance of the Stack class which will be empty and will have the default initial capacity. Stack represents a last-in, first out collection of object. It is used when you need last-in, first-out access to items. When you add an item in the list, it is called pushing the item and when you remove it, it is called popping the item. This class comes under
public Stack ();
- The number of elements that a Stack can hold is known as the Capacity of the Stack. If the elements will be added to the Stack then capacity will be automatically increased by reallocating the internal array.
- Specifying the initial capacity will eliminate the requirement to perform a number of resizing operations while adding elements to the Stack if the size of the collection can be estimated.
- This constructor is an O(1) operation.
Before Push Method: 0 After Push Method: 6