In stack we define only one pointer "head" pointing to the top element of the stack, where as in Queue we define two pointers "front" and "rear" pointing to the first and last element of the queue respectively.The main difference in the dynamic implementation of stack vs queue are: Linked List Implementation of Queue: import java.util.* Linked List Implementation of Stack: import java.io.* Here I am going to implement stack and Queue using Linked list as it is the most efficient way to implement stack as well as queue. Both stack and queue can be implemented by using Array and Linked list.Both of them are flexible in size and can grow according to requirement of input.
Both Stack and queue are linear data structure i.e, the elements in them are stored sequentially.Where as, Queues are visualized as horizontal collections. Stacks are visualized as vertical collections.
JAVA QUEUE VS STACK FULL
Where as, Queue is considered as full If If front= -1 or front = rear+1 Stack is considered as empty if If top= -1.
Where as, Queue is considered as full If rear=max-1. Stack is considered as full if If top= max-1. The enqueue operation is used to insert an element in the queue while the dequeue operation removes the element from the queue. Where as, Queue also performs mainly two operation enqueue and dequeue. The push operation is used to add an element in the stack and the pop operation is used to remove the element from the stack. Stack mainly performs two operations push and pop. The end from where insertion happens is known as rear amd the other end from where deletion occurs is known as front. Stack is open from one end only from which both insertion and deletion happens which is also known as top. Where as, Queue follows FIFO (First in First Out) principle in which the element which has been inserted at first will be removed first. Stack follows LIFO (Last in First Out) principle in which the element which has been inserted at last will be removed first. size() : It returns the size of the queue.getRear() : It returns the rear element of the queue from where insertion happens.getFront() : It returns the front element of the queue from where deletion happens.dequeue() : It is used to remove an item from the queue and return it.enqueue() : It is used to add or insert an item to the queue.The end from which the insertion happens in queue is known as REAR where as, the end from which the deletion happens is known as FRONT. we can imagine queue similar to the queue of people at a ticket counter in which first person at the queue will get the ticket and will get out from the queue. Unlike stacks queue is open from two ends in which insertion from one end and deletion from the other end. Queue is a linear data structure which is based on first in first out (FIFO) principle i.e, the element which have been inserted first will be removed first. isEmpty() : Returns true if stack is empty i.e, if there is no elements present in the stack.size() : It returns the current size of the size.peek() : It returns the element present at the top.pop() : It removes the element from the top and returns it value.push(x) : It is used to insert an element to the top of the stack.In stack,w e can only insert elements of same data type. In case of an array, we can access any element of an array at any time, whereas in a stack, we can only access the elements of the stack in the sequential manner. So, stack is basically a container which is closed from one end. It is based on LIFO (last-in-first-out) principle in which both insertion and deletion takes place from one end only. In this article, we will be discussing about "Stack vs Queue" in detail.Ī stack is a linear data structure in which both insertion and deletion operation occurs at one end.
0 kommentar(er)
