Change class vector size

Question

I have to use vector public static String vetor[] = new String [15]; in the class... but this class is used in a Servlet. And the size I need the vector is what the user chooses... how can I pass the parameter that defines the vector size. I know this 15 is only representative... I need a variable, but how to declare a class vector using a variable that comes from Servlet?

Answer 1

You can solve this by instantiating the vector in the class constructor and taking the size as argument:

public class Teste
{
   public static String vetor[];
   ...
   public Teste(int tamanhoVetor)
   {
       vetor = new String [tamanhoVetor];
   }
}

In the Servlet could be something like (the way you take the value can be different):

...
Teste testando = new Teste(Integer.valueOf(request.getAttribute("txtTamanho").toString()));
...

Answer 2

I don’t know if you’re working with JSP, but if you are, you need to use Request for this

   request.setAttribute("key", "valor") //set uma variavel de request

   RequestDispatcher rd = request.getRequestDispatcher("/teste.jsp"); 
   rd.forward(request, response);

   String valor = (String) request.getAttribute("key"); //pega o request na sua classe jsp

   String meuArray[] = new String[valor]; //Set o valor passado no seu Array =)