public T PopBack()
{
if (Empty)
{
throw new Exception("Queue empty.");
}
LinkedElement <T> temp = first;
while (temp.getParent() != last)
{
if (temp.getParent() == null)
{
last = null;
first = null;
return(temp.valor);
}
temp = temp.getParent();
}
temp.setParent(null);
LinkedElement <T> temp2 = last;
last = temp;
return(temp2.valor);
}
public void Push(T valor)
{
if (valor == null)
{
throw new Exception("Invalid value: null");
}
LinkedElement <T> element = new LinkedElement <T>(valor);
element.setParent(top);
top = element;
}
public void Enter(T valor)
{
if (valor == null)
{
throw new Exception("Invalid value: null");
}
LinkedElement <T> element = new LinkedElement <T>(valor);
if (first == null)
{
first = element;
}
if (last != null)
{
last.setParent(element);
}
last = element;
}
public void PushFront(T valor)
{
if (valor == null)
{
throw new Exception("Invalid value: null");
}
LinkedElement <T> element = new LinkedElement <T>(valor);
if (first != null)
{
element.setParent(first);
}
else
{
last = element;
}
first = element;
}
