Stack Peek 

The following example shows how to use Stack.peek API and related operations. Stack provides the following APIs,

public synchronized E peek()
 - Returns the object at top of stack without remove it from stack.   

public E push(E paramE)
 - Pushes an element onto the top of stack. 

public synchronized E pop()
 - Removes the element at top of stack.

File Name  :   com/bethecoder/tutorials/utils/stack/StackPeek.java  Author  :   Sudhakar KV Email  :   [email protected]

package com.bethecoder.tutorials.utils.stack; import java.util.Stack; public class StackPeek {   /**    * @param args    */   public static void main(String[] args) {     Stack<String> stack = new Stack<String>();     stack.push("ONE");     stack.push("TWO");     stack.push("THREE");     stack.push("FOUR");     System.out.println("Stack : " + stack);     System.out.println();          //Current top of stack     System.out.println("Current top of the stack : " + stack.peek());          //Remove the top of stack     System.out.println("Popped : " + stack.pop());          //Current top of stack     System.out.println("Current top of the stack : " + stack.peek());          //Remove the top of stack     System.out.println("Popped : " + stack.pop());          //Current top of stack     System.out.println("Current top of the stack : " + stack.peek());        } }

Stack : [ONE, TWO, THREE, FOUR]

Current top of the stack : FOUR
Popped : FOUR
Current top of the stack : THREE
Popped : THREE
Current top of the stack : TWO