package datastructs;

public class Stack<T> {

    private StackNode<T> currentNode;

    public Stack() {
        currentNode = null;
    }

    public void push(T value){
        StackNode<T> newNode = new StackNode<T>(value, currentNode);
        currentNode = newNode;
    }

    public T pop(){
        T temp = currentNode.getValue();
        delete();
        return temp;
    }

    public void delete(){
        currentNode = currentNode.getNext();
    }

    public int size(){
        int size = 0;
        StackNode<T> sizeNode = currentNode;
        while(sizeNode.getNext() != null){
            size++;
            sizeNode = sizeNode.getNext();
        }
        size++;
        return size;
    }

    public void print(){
        StringBuilder sb = new StringBuilder();
        StackNode<T> printNode = currentNode;
        while(printNode.getNext() != null){
            sb.append(printNode.getValue());
            sb.append("\n");
            printNode = printNode.getNext();
        }
        sb.append(printNode.getValue());
        System.out.println(sb.toString());
    }

}