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//program to demonstrate stack as array class Stack { int top; int arr[]; Stack() { arr=new int[10]; top=-1; } int pop() { int element; element=arr[top]; top--; return element; } void push(int element) { top=top+1; arr[top]=element; } } public class StackDemo { public static void main(String args[]) { Stack ob=new Stack(); ob.push(10); ob.push(20); System.out.println(ob.pop()); System.out.println(ob.pop()); } }