Stack Java Library Last Updated : 03 Nov, 2024 Comments Improve Suggest changes Like Article Like Report In Java, there are multiple ways to use built-in libraries for Stack.Stack Class It is a legacy collection from early Java versions. It is outdated and rarely used in modern JavaIt's synchronized and thread-safe, which can be slower in single-threaded applications like doing data structures and CP problems.Synchronized by default, which might add unnecessary overhead if thread-safety isn't required.ArrayDeque Class Faster performance for single-threaded scenarios.Resizable array-backed without the overhead of synchronization.More flexible, as it can also be used as a queue.Cannot store null elements (throws NullPointerException if attempted).If you are not sure for a coding problem, you may always use this for fast performance. Java import java.util.ArrayDeque; import java.util.Deque; public class GFG { // Driver Code public static void main(String[] args) { // Creating an ArrayDeque to use // as a Stack Deque<Integer> s = new ArrayDeque<Integer>(); // Inserting elements in the Stack // using push() operation s.push(17); s.push(19); s.push(15); // Printing the elements System.out.println("Stack after insertion: " + s); // Removing elements from the Stack // using pop() operation s.pop(); System.out.println("Stack after deletion: " + s); s.pop(); System.out.println("Stack after deletion: " + s); } } OutputStack after insertion: [15, 19, 17] Stack after deletion: [19, 17] Stack after deletion: [17] LinkedList ClassAlso implements Deque and can be used as a stack, queue, or double-ended queue. It is a doubly-linked list implementation.We use LinkedList when we want to leverage linked list operations like insertions and deletions are required at both ends.More memory overhead as we used linked list.FeatureStackArrayDequeLinkedListSynchronizationYesNoNoBacking StructureArray (Vector)Resizable ArrayDoubly-Linked ListNull ElementsYesNoYesUse as QueueNoYesYesPerformanceSlowerFastestModerateMemory OverheadModerateLowHighThread SafetySynchronizedNot thread-safeNot thread-safe Comment More infoAdvertise with us Next Article Stack Java Library K kartik Follow Improve Article Tags : Java Stack Data Structures Java-Collections Practice Tags : Data StructuresJavaJava-CollectionsStack Similar Reads Growable array based stack We all know about Stacks also known as Last-In-First-Out(LIFO) structures. Stack primarily has two main operation namely push and pop, where push inserts an element at top and pop removes an element from top of the stack. Now, whenever an implementation of stack is considered its size is pre-determi 9 min read Stack Class in Java The Java Collection framework provides a Stack class, which implements a Stack data structure. The class is based on the basic principle of LIFO (last-in-first-out). Besides the basic push and pop operations, the class also provides three more functions, such as empty, search, and peek. The Stack cl 11 min read Stack in C++ STL In C++, stack container follows LIFO (Last In First Out) order of insertion and deletion. It means that most recently inserted element is removed first and the first inserted element will be removed last. This is done by inserting and deleting elements at only one end of the stack which is generally 5 min read LIFO Principle in Stack LIFO stands for "Last In, First Out". This principle dictates that the last element added to the stack is the first one to be removed. In other words, the most recently added element is always at the top, and any operations on the stack will affect this top element. Use of LIFO principle in Stack:Pu 3 min read Implement Stack using Array Stack is a linear data structure which follows LIFO principle. To implement a stack using an array, initialize an array and treat its end as the stackâs top. Implement push (add to end), pop (remove from end), and peek (check end) operations, handling cases for an empty or full stack.Step-by-step ap 10 min read Like