public class Stack
{
	private int     size;
	
	private EVListe stack    = new EVListe();
	private int     elements = 0;
	
	public Stack(int size)
	{
		this.size  = size;
	}
	
	public void setSize(int size)       { this.size = size;   }
	public int getSize()                { return this.size;   }
	
	public void push(Object o)
	{
		if (this.elements < this.size)
		{
			this.stack.addFirst(o);
			this.elements++;
		}
		else
		{
			System.out.println("=== STACK OVERFLOW ===");
		}
	}
	
	public Object pop()
	{
		if (!this.isEmpty())
		{
			Object o = this.stack.getFirst();
			this.stack.removeFirst();
			this.elements--;
			return o;
		}
		else
		{
			System.out.println("=== STACK EMPTY ===");
			return null;
		}
	}
	
	public boolean isEmpty()
	{
		return (this.elements == 0) ? true : false;
	}
	
	public static void main(String[] args)
	{
		Stack s = new Stack(5);
		
		s.push(5);
		s.push(4);
		s.push(3);
		s.push(2);
		s.push(1);
		s.push(0); // === STACK OVERFLOW ===
		
		System.out.println(s.pop());
		System.out.println(s.pop());
		System.out.println(s.pop());
		System.out.println(s.pop());
		System.out.println(s.pop());
		System.out.println(s.pop()); // === STACK EMPTY ===
		
		System.out.println();
		System.out.println("-------------------");
		
		s.push(3);
		s.push(2);
		s.push(1);
		s.push(0);
		
		System.out.println(s.pop());
		System.out.println(s.pop());
		System.out.println(s.pop());
		System.out.println(s.pop());
	}
}