public class StackNode<InnerItem > {
                private InnerItem value;
                private StackNode<InnerItem> next;


                public StackNode(InnerItem v, StackNode<InnerItem> n) {

                	value = v;
                	next = n;
				}



				public InnerItem getValue( ) {
                        return value;
                }

                public void setValue( InnerItem newValue ) {
                        value = newValue;
                }

                public StackNode<InnerItem> getNext( ) {
                        return next;
                }

                public void setNext( StackNode<InnerItem> nextNode ) {
                        next = nextNode; }
        }




        @Override
        public Item pop() {

                Item temp = top.getValue();
                top = top.getNext();
                size--;
                return temp;

        }

        @Override
        public Item peek() {

                return top.getValue();
        }

        @Override
        public void push(Item item) {

                StackNode<Item> value = new StackNode<Item>(item,top);
                top = value;
                size++;

        }

        @Override
        public boolean isEmpty() {

                if(size == 0){
                        return true;
                }
                return false;
        }

        @Override
        public int size() {

                return size;
        }

}