Java.util.Stack Class

Introduction

The java.util.Stack class represents a last-in-first-out (LIFO) stack of objects.

When a stack is first created, it contains no items.

In this class, the last element inserted is accessed first.

Following is the declaration for java.util.Stack class −

pubpc class Stack<E>
   extends Vector<E>

Sr.No.	Constructor & Description
1	Stack() This constructor creates an empty stack.

Sr.No.	Method & Description
1	boolean empty() This method tests if this stack is empty.
2	E peek() This method looks at the object at the top of this stack without removing it from the stack.
3	E pop() This method removes the object at the top of this stack and returns that object as the value of this function.
4	E push(E item) This method pushes an item onto the top of this stack.
5	int search(Object o) This method returns the 1-based position where an object is on this stack.

This class inherits methods from the following classes −

java.util.Vector

java.util.AbstractList

java.util.Object

java.util.List